Wiki source code of 3.4 Protections

Version 35.1 by Admin on 2025/08/22 14:06

version	line-number	content
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5.1	2	= Configuration =
1.1	3
	4	(% data-numbered-headings-start="4" style="--numbered-headings-start: 3;font-size: 0px;color: rgba(0, 0, 0, 0.0);margin-bottom: 0px; margin-top: 0px;" %)
	5	== Protections ==
	6
	7	The BMS Main 3 device continuously monitors the state of the cells, the external environment and, when detecting abnormalities, protects the battery and system components from damage.
	8
21.1	9	(% class="box errormessage" %)
18.1	10	(((
	11	Attention!
	12	Behavior of contactors at different errors is configured in corresponding contactor settings!
	13	)))
	14
2.1	15	=== Overcurrent ===
1.1	16
	17	The BMS Main 3 device performs the overcurrent protection depending on current sensor values.
	18
	19	To change the overcurrent protection of the battery, select the "Protections → Overcurrent" section:
	20
11.2	21	[[image:1735224601506-488.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="123" width="800"]]
1.1	22
	23	In this section:
	24
	25	* Enable – a flag to enable the protection;
	26	* Maximum charging current, А;
	27	* Tolerant charging current, А;
	28	* Maximum discharging current, А;
	29	* Tolerant discharging current, А;
	30	* Delay before setting the error, millisecond;
	31	* Delay before clearing the error, second;
	32	* Lock – a flag to block the error until the device is restarted.
	33
	34	As a result of operation of the overcurrent protection, the "Overcurrent" error is generated.
	35
	36	Error generation conditions:
	37
	38	* the current is positive (charging), and its modulo value is greater than the “Maximum charging current” value for the “Delay before setting the error” time;
	39	* the current is negative (discharging), and its modulo value is greater than the “Maximum discharging current” value for the “Delay before setting the error” time.
	40
	41	Conditions for removing the error:
	42
	43	* the current is positive (charging) or zero, and its modulo value is less than the “Tolerant charging current” value for the “Delay before clearing the error” time;
	44	* the current is negative (discharging) or zero, and its modulo value is less than the “Tolerant discharging current” value for the “Delay before clearing the error” time.
	45
6.2	46	=== Charge current limit ===
	47
17.2	48	The BMS Main 3 device can check if the charging current exceeds the estimated limit based on the [[Charge map>>doc:Battery management systems.BMS Main 3.3\. Configuration.3\.3 Control.WebHome\|\|anchor="HChargemap"]]. If current exceeds the calculated limit more than configured difference, "Current limit" error is generated.
6.2	49
16.46	50	Current difference is separated to two regions by the threshold value. Maximum current in Region 1 is calculated by the absolute difference, in Region 2 – by the relative difference.
16.15	51
16.8	52	To change the overcurrent protection of the battery, select the "Protections → Charge current limit" section:
16.2	53
16.8	54	[[image:1735225207687-430.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="113" width="800"]]In this section:
	55
	56	* Enable – a flag to enable the protection;
18.1	57	* Threshold to switch from Region 1 to Region 2 – a current value at which current excess calculation will be switched from absolute to relative difference, A;
27.2	58	* Region 1: Current difference – a value of maximum absolute current difference, A;
18.1	59	* Region 2: Current difference – a value of maximum relative current excess, A;
	60	* Delay before setting the error, millisecond;
	61	* Delay before clearing the error, second;
	62	* Lock – a flag to block the error until the device is restarted.
16.8	63
6.2	64	=== Discharge current limit ===
	65
17.2	66	The BMS Main 3 device can check if the discharging current exceeds the estimated limit based on the [[Discharge map>>doc:Battery management systems.BMS Main 3.3\. Configuration.3\.3 Control.WebHome\|\|anchor="HDischargemap"]]. If current exceeds the calculated limit more than configured difference, "Current limit" error is generated.
6.2	67
16.47	68	Current difference is separated to two regions by the threshold value. Maximum current in Region 1 is calculated by the absolute difference, in Region 2 – by the relative difference.
16.44	69
17.2	70	To change the overcurrent protection of the battery, select the "Protections → Discharge current limit" section:
16.44	71
17.2	72	[[image:1735225942893-869.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="113" width="800"]]
	73
	74	In this section:
	75
	76	* Enable – a flag to enable the protection;
18.1	77	* Threshold to switch from Region 1 to Region 2 – a current value at which current excess calculation will be switched from absolute to relative difference, A;
27.2	78	* Region 1: Current difference – a value of maximum absolute current difference, A;
18.1	79	* Region 2: Current difference – a value of maximum relative current excess, A;
	80	* Delay before setting the error, millisecond;
	81	* Delay before clearing the error, second;
	82	* Lock – a flag to block the error until the device is restarted.
17.2	83
2.1	84	=== Undervoltage ===
1.1	85
	86	The BMS Main 3 device implements battery protection from too low voltage on the cells.
	87
	88	To change the battery protection parameters from low voltage on the cells, select the "Protections → Undervoltage" section:
	89
8.2	90	[[image:1735224224155-829.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="112" width="800"]]
1.1	91
	92	In this section:
	93
	94	* Enable – a flag to enable the protection;
	95	* Minimum cell voltage, V;
	96	* Tolerant cell voltage, V;
29.1	97	* Check the open circuit voltage instead of the actual voltage – a flag to use the U,,ocv,, (corrected due to current and cell resistance) cell voltage;
1.1	98	* Delay before setting the error, millisecond;
	99	* Delay before clearing the error, second;
	100	* Lock – a flag to block the error until the device is restarted.
	101
	102	As a result of the operation of battery protection from low voltage, the "Undervoltage" error is generated.
	103
	104	Error generation conditions:
	105
	106	* the minimum voltage among all cells of the battery is less than the “Minimum cell voltage” value for the “Delay before setting the error” time.
	107
	108	Conditions for removing the error:
	109
	110	* the minimum voltage among all cells of the battery is greater than the “Tolerant cell voltage” value for the “Delay before clearing the error” time.
	111
2.1	112	=== Overvoltage ===
1.1	113
	114	The BMS Main 3 device implements battery protection from too high voltage on the cells.
	115
	116	To change the battery protection parameters from high voltage on the cells, select the "Protections → Overvoltage" section:
	117
9.2	118	[[image:1735224377252-473.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="114" width="800"]]
1.1	119
	120	In this section:
	121
	122	* Enable – a flag to enable the protection;
	123	* Maximum cell voltage, V;
	124	* Tolerant cell voltage, V;
29.1	125	* Check the open circuit voltage instead of the actual voltage – a flag to use the U,,ocv,, (corrected due to current and cell resistance) cell voltage;
1.1	126	* Delay before setting the error, millisecond;
	127	* Delay before clearing the error, second;
	128	* Lock – a flag to block the error until the device is restarted.
	129
	130	As a result of the operation of the battery protection from high voltage, the "Overvoltage" error is generated.
	131
	132	Error generation conditions:
	133
	134	* the maximum voltage among all cells of the battery is greater than the “Maximum cell voltage” value for the “Delay before setting the error” time.
	135
	136	Conditions for removing the error:
	137
	138	* the maximum voltage among all cells of the battery is less than the “Tolerant cell voltage” value for the “Delay before clearing the error” time.
	139
2.1	140	=== Low temperature ===
1.1	141
	142	The BMS Main 3 device implements battery protection from too low temperature.
	143
	144	To change the battery protection parameters from low temperature, select the "Protections → Low temperature" section:
	145
2.1	146	[[image:1733328382382-670.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="137" width="800"]]
1.1	147
	148	In this section:
	149
	150	* Enable – a flag to enable the protection;
	151	* Minimum charge temperature, °C;
	152	* Tolerant charge temperature, °C;
	153	* Minimum discharge temperature, °C;
	154	* Tolerant discharge temperature, °C;
	155	* Delay before setting the error, millisecond;
	156	* Delay before clearing the error, second;
	157	* Lock – a flag to block the error until the device is restarted.
	158
	159	As a result of the operation of the battery protection from low temperature, the "Low temperature (CH)" and/or “Low temperature (DCH)” error are generated.
	160
	161	Error generation conditions:
	162
	163	* the minimum temperature among all cells of the battery is less than the “Minimum charging (discharging) temperature” value for the “Delay before setting the error” time.
	164
	165	Conditions for removing the error:
	166
	167	* the minimum temperature among all cells of the battery is greater than the “Tolerant charging (discharging) temperature” value for the “Delay before clearing the error” time.
	168
2.1	169	=== High temperature ===
1.1	170
	171	The BMS Main 3 device implements battery protection from too high temperature.
	172
	173	To change the battery protection parameters from high temperature, select the "Protections → High temperature" section:
	174
2.1	175	[[image:1733328399408-279.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="138" width="800"]]
1.1	176
	177	In this section:
	178
	179	* Enable – a flag to enable the protection;
	180	* Maximum charge temperature, °C;
	181	* Tolerant charge temperature, °C;
	182	* Maximum discharge temperature, °C;
	183	* Tolerant discharge temperature, °C;
	184	* Delay before setting the error, millisecond;
	185	* Delay before clearing the error, second;
	186	* Lock – a flag to block the error until the device is restarted.
	187
	188	As a result of the operation of the battery protection from high temperature, the "High temperature (CH)" or “High temperature (DCH)” error is generated.
	189
	190	Error generation conditions:
	191
	192	* the maximum temperature among all cells of the battery is greater than the “Maximum charging (discharging) temperature” value for the “Delay before setting the error” time.
	193
	194	Conditions for removing the error:
	195
	196	* the maximum temperature among all cells of the battery is less than the “Tolerant charging (discharging) temperature” value for the “Delay before clearing the error” time.
	197
2.1	198	=== Battery cover ===
1.1	199
	200	To change the protection parameters from opening the battery cover, select the "Protections → Battery cover" section:
	201
2.1	202	[[image:1733328399410-529.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="113" width="800"]]
1.1	203
	204	In this section:
	205
	206	* Enable – a flag to enable the protection;
	207	* Delay before setting the error, millisecond;
	208	* Delay before clearing the error, second;
	209	* Lock – a flag to block the error until the device is restarted.
	210
	211	As a result of the operation of the protection against opening the battery cover, the “Battery cover error” is generated.
	212
	213	Error generation conditions:
	214
	215	* there is a signal from the battery cover during the “Delay before setting the error” time.
	216
	217	Conditions for removing the error:
	218
	219	* no signal from the battery cover during the “Delay before clearing the error” time.
	220
2.1	221	(% class="box warningmessage" %)
	222	(((
18.1	223	If there is the "Battery cover error", the “Critical error” is generated.
2.1	224	)))
1.1	225
2.1	226	=== High humidity ===
1.1	227
	228	The BMS Main 3 can detect that the battery is operating in high humidity conditions.
	229
	230	To change the detection parameters, select the "Protections → High humidity" section:
	231
2.1	232	[[image:1733328399412-184.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="106" width="800"]]
1.1	233
	234	In this section:
	235
	236	* Enable – a flag to enable the detection;
	237	* Maximum humidity, RH%;
	238	* Tolerant humidity, RH%;
	239	* Delay before setting the error, second;
	240	* Delay before clearing the error, second;
	241	* Lock the error until the device is reset.
	242
	243	As a result of the operation of the battery protection from high humidity, the "High humidity" error is generated.
	244
	245	Error generation conditions:
	246
	247	* the measured humidity is greater than “Maximum humidity” during the “Delay before setting the error” time.
	248
	249	Conditions for removing the error:
	250
	251	* the measured humidity is less than the “Tolerant humidity” during the “Delay before clearing the error” time.
	252
2.1	253	(% class="box infomessage" %)
	254	(((
1.1	255	If there is the "High humidity" error, no action is taken. The error is indicative.
2.1	256	)))
1.1	257
2.1	258	=== Water ===
1.1	259
	260	The BMS Main 3 can protect the battery from working in very high humidity conditions.
	261
	262	To change the protection parameters, select the "Protections → Water" section:
	263
2.1	264	[[image:1733328399413-393.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="107" width="800"]]
1.1	265
	266	In this section:
	267
	268	* Enable – a flag to enable the protection;
	269	* Maximum humidity, RH%;
	270	* Tolerant humidity, RH%;
	271	* Delay before setting the error, second;
	272	* Delay before clearing the error, second;
	273	* Lock – lock the error until the device is reset.
	274
	275	As a result of the operation of the battery protection from water, the "Water" error is generated.
	276
	277	Error generation conditions:
	278
	279	* the measured humidity is greater than the “Maximum humidity” value during the “Delay before setting the error” time.
	280
	281	Conditions for removing the error:
	282
	283	* the measured humidity is less than the “Tolerant humidity” value during the “Delay before clearing the error” time.
	284
18.1	285	(% class="box warningmessage" %)
2.1	286	(((
18.1	287	If there is the “Water” error, the “Critical error” is generated.
2.1	288	)))
1.1	289
6.4	290	=== Logic high temperature ===
1.1	291
	292	To change the overheating protection parameters of BMS Logic devices, select the "Protections → High Logic temperature" section:
	293
2.1	294	[[image:1733328399414-280.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="105" width="800"]]
1.1	295
	296	In this section:
	297
	298	* Enable – a flag to enable the protection;
	299	* Maximum temperature, °C;
	300	* Tolerant temperature, °C;
	301	* Delay before setting the error, second;
	302	* Delay before clearing the error, second;
	303	* Lock – lock the error until the device is reset.
	304
	305	As a result of the operation of the protection from high temperatures of BMS Logic devices, the "High Logic temperature" is generated.
	306
	307	Error generation conditions:
	308
	309	* a BMS Logic device temperature is higher than the “Maximum temperature” value.
	310
	311	Conditions for removing the error:
	312
	313	* a BMS Logic device temperature is less than the “Tolerant temperature” value.
	314
4.1	315	(% class="box infomessage" %)
2.1	316	(((
4.1	317	Cell balancing is disabled on Logic devices with high temperature.
2.1	318	)))
1.1	319
2.1	320	=== Logic offline ===
1.1	321
	322	To change the protection parameters from loss of communication with BMS Logic devices, select the "Protections → Logic offline" section:
	323
34.1	324	[[image:1755871522789-489.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="102" width="800"]]
1.1	325
34.1	326
1.1	327	In this section:
	328
	329	* Enable – a flag to enable the protection;
34.1	330	* Delay before setting the error, second;
	331	* Delay before clearing the error, second;
1.1	332	* Lock – lock the error until the device is reset.
	333
	334	As a result of the protection from loss of communication with BMS Logic devices, the "Logic offline" error is generated.
	335
	336	Error generation conditions:
	337
	338	* at least one of the connected BMS Logic devices does not respond to the commands of the BMS Main device for 10 seconds.
	339
	340	Conditions for removing the error:
	341
	342	* all connected BMS Logic devices respond to the commands of the BMS Main device.
	343
2.1	344	(% class="box warningmessage" %)
	345	(((
18.1	346	If there is the "Logic offline" error, the “Critical error” is generated.
2.1	347	)))
	348
	349	=== Cell count ===
	350
	351	To change the protection parameters from the mismatch of the number of cells to the set value, select the "Protections → Cell count" section:
	352
	353	[[image:1733328415731-223.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="97" width="800"]]
	354
	355	In this section:
	356
	357	* Enable – a flag to enable the protection;
	358	* Number of cells – a number of cells connected to the BMS;
	359	* Delay before setting the error, millisecond;
	360	* Delay before clearing the error, second;
	361	* Lock – a flag to block the error until the device is restarted.
	362
	363	As a result of the operation of the protection from the mismatch of the number of cells, the "Cell count error" is generated.
	364
	365	Error generation conditions:
	366
	367	* the number of cells connected to the BMS is not equal to the “Number of cells” value during the “Delay before setting the error” time.
	368
	369	Conditions for removing the error:
	370
	371	* the number of cells connected to the BMS is equal to the “Number of cells” value during the “Delay before clearing the error” time.
	372
	373	(% class="box warningmessage" %)
	374	(((
18.1	375	If there is the "Cell count error", the “Critical error” is generated.
2.1	376	)))
	377
	378	=== Logic count ===
	379
	380	To change the protection parameters from the mismatch of the number of BMS Logic devices to the set value, select the "Protections → Logic count” section:
	381
	382	[[image:1733328415732-163.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="110" width="800"]]
	383
	384	In this section:
	385
	386	* Enable – a flag to enable the protection;
	387	* Logic count – a number of BMS Logic devices connected to the BMS Main;
	388	* Scan fast – a flag to scan BMS Logic devices fast (devices with addresses from 1 to “Logic count” are scanned; this mode reduces BMS system startup time);
	389	* Lock – lock the error until the device is reset.
	390
	391	As a result of the operation of the protection from the mismatch of the number of BMS Logic devices, the "Logic count error" is generated.
	392
	393	Error generation conditions:
	394
	395	* the number of BMS Logic devices connected to the BMS Main is not equal to the “Logic count” value.
	396
	397	Conditions for removing the error:
	398
	399	* the number of BMS Logic devices connected to the BMS Main is equal to the “Logic count” value.
	400
	401	(% class="box warningmessage" %)
	402	(((
18.1	403	If there is the "Logic count error", the “Critical error” is generated.
2.1	404	)))
	405
	406	=== Short circuit ===
	407
	408	The BMS Main 3 device implements the protection of power circuits (contactors, power wires) against overheating caused by the flow of high current for a long time.
	409
	410	To change the protection parameters from short circuit, select the "Protections → Short circuit" section:
	411
12.2	412	[[image:1735224667621-969.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="153" width="800"]]
2.1	413
	414	In this section:
	415
	416	* Level 1, 2, 3 – three protection levels. The following parameters are configured at each level:
	417	** Enable – a flag to enable the protection;
	418	** Maximum current, A;
	419	** Delay before setting the error, second;
	420	* Delay before clearing the error, second;
	421	* Lock – a flag to block the error until the device is restarted.
	422
	423	If there is a short circuit, the "Short circuit" error is generated.
	424
	425	Error generation conditions:
	426
	427	* at any of the three protection levels, the current modulo is greater than the “Maximum current” value during the “Delay before setting the error” time.
	428
	429	Conditions for removing the error:
	430
	431	* the current modulo is lower than the “Maximum current” values for all three protection levels during the “Delay before setting the error” time.
	432
	433	=== High contactor temperature ===
	434
	435	The BMS Main 3 device protects power contactors from overheating. To measure the temperature of the contactor, one of the thermistors connected to the X5 connector is used.
	436
	437	To change the overheating protection parameters of power contactors, select the "Protections → High contactor temperature" section:
	438
12.2	439	[[image:1735224706573-347.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="112" width="800"]]
2.1	440
	441	In this section:
	442
	443	* Enable – a flag to enable the protection;
	444	* Thermistor – a selection of which cell thermistor will be used as contactor temperature sensor;
	445	* Maximum contactor temperature, °C;
	446	* Tolerant contactor temperature, °C;
	447	* Delay before setting the error, second;
	448	* Delay before clearing the error, second;
	449	* Lock – a flag to block the error until the device is restarted.
	450
	451	If there is a contactor overheat, the "High contactor temperature" error is generated.
	452
	453	Error generation conditions:
	454
	455	* the contactor temperature is greater than the “Maximum contactor temperature” value during the “Delay before setting the error” time.
	456
	457	Conditions for removing the error:
	458
	459	* the contactor temperature is lower than the “Tolerant contactor temperature” value during the “Delay before clearing the error” time.
	460
	461	=== Current sensor ===
	462
	463	The BMS Main 3 device checks the current sensor connection circuits. The circuits are checked for breakage and short-circuit to the +5 V supply line.
	464
	465	To change the test parameters of the current sensor connection circuits, select the "Protections → Current sensor" section:
	466
	467	[[image:1733328461552-948.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="128" width="800"]]
	468
	469	In this section:
	470
	471	* Enable – a flag to enable the protection;
	472	* Maximum voltage, V;
	473	* Minimum voltage, V;
	474	* Voltage hysteresis – a hysteresis value to clear the error, V;
	475	* Delay before setting the error, second;
	476	* Delay before clearing the error, second;
	477	* Lock – a flag to block the error until the device is restarted.
	478
	479	If there is an open or short circuit connection of a current sensor, the "Current sensor error" is generated.
	480
	481	Error generation conditions:
	482
	483	* the voltage in the signal line or reference line of the current sensor is greater than the “Maximum voltage” value during the “Delay before setting the error” time;
	484	* the voltage in the signal line or reference line of the current sensor is less than the “Minimum voltage” value during the “Delay before setting the error” time.
	485
	486	Conditions for removing the error:
	487
	488	* the voltage in the signal line or reference line of the current sensor is in range from (Minimum voltage + Voltage hysteresis) to (Maximum voltage - Voltage hysteresis) during the “Delay before clearing the error” time.
	489
	490	(% class="box warningmessage" %)
	491	(((
18.1	492	If there is the “Current sensor error”, the “Critical error” is generated.
2.1	493	)))
	494
	495	=== Power switch ===
	496
	497	BMS Main 3 device checks the status of power switches that are used to control the contactors. To change the parameters of the power switch protection, select the "Protections → Power switch" section:
	498
	499	[[image:1733328461554-241.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="99" width="800"]]
	500
	501	In this section:
	502
	503	* Delay before clearing the error, second;
	504	* Lock – a flag to block the error until the device is restarted.
	505
	506	The “Power switch error” occurs when the device detects a shortage in contactor coil control circuit or an overheating of the power switch. Error is removed when the temperature of power switch is normal during “Delay before clearing the error” time.
	507
	508	(% class="box warningmessage" %)
	509	(((
18.1	510	If there is the "Power switch error", the “Critical error” is generated.
2.1	511	)))
	512
22.2	513	=== Power fault ===
	514
22.10	515	BMS Main 3 device checks the status of CAN2, CAN3, RS-485-2 and Current sensors power supply.
22.2	516
23.2	517	(% class="box infomessage" %)
	518	(((
25.1	519	Note: this error can be configured only under "Service" account.
23.2	520	)))
	521
22.10	522	To change the parameters of the power fault error, select the "Protections → Power fault" section:
	523
22.2	524	[[image:1739284154410-676.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="96" width="800"]]
	525
	526	In this section:
	527
25.2	528	* Enable – a flag to enable the protection;
22.2	529	* Delay before setting the error, millisecond;
22.3	530	* Time to keep power off, millisecond;
	531	* Delay before clearing the error, millisecond;
22.2	532	* Lock – a flag to block the error until the device is restarted.
	533
26.1	534	The “Power fault” occurs when the device detects a shortage or high power consumption in power supplies mentioned above. After that BMS turns off the corresponding power supply for "Time to keep power off", then it tries to enable power again.
22.2	535
25.2	536	Error is removed when the power consumption is normal during “Delay before clearing the error” time.
	537
22.2	538	(% class="box warningmessage" %)
	539	(((
23.1	540	If there is the "Power fault", the “Critical error” is generated.
22.2	541	)))
	542
2.1	543	=== Charge contactor cycles ===
	544
	545	The BMS Main 3 device protects the charging contactor against frequent switching.
	546
	547	To change the protection parameters against high frequency switching of the charging contactor, select the "Protections → Charge contactor cycles" section:
	548
	549	[[image:1733328461555-351.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="124" width="800"]]
	550
	551	In this section:
	552
	553	* Enable – a flag to enable the protection;
	554	* Cycles threshold – a number of cycles in a given period, upon which the “CH contactor cycles error” is generated;
	555	* Check time – a time in which the BMS counts switching cycles of the charging contactor, second;
	556	* Delay before setting the error, millisecond;
	557	* Delay before clearing the error, second;
	558	* Lock – a flag to block the error until the device is restarted.
	559
	560	If there is a high switching frequency of the charging contactor, the “CH contactor cycles error” is generated.
	561
	562	Error generation conditions:
	563
	564	* the number of switching cycles of the charging contactor for the “Check time” time is greater than or equal to the “Cycles threshold” value. The error is generated with the “Delay before setting the error” delay.
	565
	566	Conditions for removing the error:
	567
	568	* the “Delay before clearing the error” time has passed since the error was generated.
	569
3.1	570	=== Discharge contactor cycles ===
2.1	571
	572	The BMS Main 3 device protects the discharging contactor against frequent switching.
	573
	574	To change the protection parameters against high frequency switching of the discharging contactor, select the "Protections → Discharging contactor cycles" section:
	575
	576	[[image:1733328461560-301.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="123" width="800"]]
	577
	578	In this section:
	579
	580	* Enable – a flag to enable the protection;
	581	* Cycles threshold – a number of cycles in a given period, upon which the “DCH contactor cycles error” is generated;
	582	* Check time – a time in which the BMS counts switching cycles of the charging contactor, second;
	583	* Delay before setting the error, millisecond;
	584	* Delay before clearing the error, second;
	585	* Lock – a flag to block the error until the device is restarted.
	586
	587	If there is the high switching frequency of the discharging contactor, the “DCH contactor cycles error” is generated.
	588
	589	Error generation conditions:
	590
	591	* the number of switching cycles of the discharging contactor for the “Check time” time is greater than or equal to the “Cycles threshold” value. The error is generated with the “Delay before setting the error” delay.
	592
	593	Conditions for removing the error:
	594
	595	* the “Delay before clearing the error” time has passed since the error was generated.
	596
	597	=== Temperature sensors ===
	598
	599	The BMS Main 3 device checks the temperature sensors connection circuits. The circuits are checked for breakage and short-circuit.
	600
	601	To change the protection parameters of the temperature sensors circuits, select the "Protections → Temperature sensors" section:
	602
	603	[[image:1733328471918-980.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="102" width="800"]]
	604
	605	In this section:
	606
	607	* Enable – a flag to enable the protection;
	608	* Delay before setting the error, millisecond;
	609	* Delay before clearing the error, second;
	610	* Lock – a flag to block the error until the device is restarted.
	611
	612	If there are no temperature sensors connected to any BMS Logic device or any temperature sensor of the BMS Logic is shorted, the "No temp. sensors" error and "Temp. sensor is shorted" error are generated respectively. These errors generated and removed with the “Delay before setting the error” and “Delay before clearing the error” delays.
	613
	614	(% class="box warningmessage" %)
	615	(((
18.1	616	If there is the “No temp. sensors” or “Temp. sensor is shorted” error, the “Critical error” is generated.
2.1	617	)))
	618
	619	=== WDT reset ===
	620
	621	If the BMS firmware hangs, the watchdog timer resets the device. The BMS can detect that the device was reset and generates the “WDT reset” error.
	622
	623	To change the parameters of the watchdog protection, select the "Protections → WDT reset" section:
	624
	625	[[image:1733328471919-183.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="101" width="800"]]
	626
	627	In this section:
	628
	629	* Enable – a flag to enable the protection;
	630	* Delay before clearing the error, second;
	631	* Lock – a flag to block the error until the device is restarted.
	632
	633	Conditions for removing the error:
	634
	635	* the “Delay before clearing the error” time has passed from the device startup.
	636
	637	(% class="box warningmessage" %)
	638	(((
18.1	639	If there is the "WDT reset" error, the “Critical error” is generated.
2.1	640	)))
	641
4.1	642	=== Unallowable charging ===
2.1	643
	644	The BMS can detect that the battery is charging through the discharging circuit and protectively open the discharging contactor to prevent unallowable battery operation.
	645
	646	To change the parameters of the unallowable charging protection, select the "Protections → Unallowable charging" section:
	647
	648	[[image:1733328471920-923.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="97" width="800"]]
	649
	650	In this section:
	651
	652	* Enable – a flag to enable the protection;
	653	* Delay before setting the error, second;
	654	* Delay before clearing the error, second;
	655	* Lock – a flag to block the error until the device is restarted.
	656
	657	If there is charging the battery through the discharging circuit detected, the "Unallowable charging" error is generated.
	658
	659	Error generation conditions:
	660
	661	* the charging contactor is open, and the battery current is not zero during the “Delay before setting the error” time.
	662
	663	Conditions for removing the error:
	664
	665	* the battery current is zero during the “Delay before clearing the error” time.
	666
5.1	667	=== Stuck contactor ===
2.1	668
	669	The BMS Main 3 device protects contactors against sticking.
	670
	671	To change the protection parameters against sticking, select the "Protections → Stuck contactor" section:
	672
	673	[[image:1733328471920-314.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="123" width="800"]]
	674
	675	In this section:
	676
	677	* Enable – a flag to enable the protection;
	678	* Delay before setting the error, millisecond;
	679	* Delay before clearing the error, second;
	680	* Check voltage – a flag to enable checking of voltage before and after contactors to detect the fact of contactor sticking;
	681	* Abnormal voltage difference – the difference of voltages before and after contactors at which BMS indicates and error;
	682	* Lock – a flag to block the error until the device is restarted.
	683
	684	If there is a stuck contactor, the “Stuck contactor” error is generated. Error generation conditions:
	685
	686	* The charging and discharging contactors are open, but the “Charging current present” or “Discharging current present” signal is set or (if “Check voltage” flag is set) “Charging/Discharging” contactor is open and voltage difference before and after contactors is lower than “Abnormal voltage difference”.
	687
	688	(% class="box warningmessage" %)
	689	(((
18.1	690	If there is the “Stuck contactor” error, the “Critical error” is generated.
2.1	691	)))
	692
	693	=== Contactor feedback ===
	694
	695	The BMS Main 3 device can receive feedback signals from contactors and detect discrepancy between the control value and the feedback signal. To enable specific contactor protection, the feedback signal must be connected to the corresponding contactor feedback pin on the X3 header.
	696
	697	To change the contactor feedback check parameters, select the "Protections → Contactor feedback" section:
	698
	699	[[image:1733328487096-144.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="109" width="800"]]
	700
	701	In this section:
	702
	703	* Enable – a flag to enable the protection;
	704	* Delay before setting the error, millisecond;
	705	* Delay before clearing the error, second;
	706	* Lock – a flag to block the error until the device is restarted.
	707
	708	If there is a discrepancy at any contactor, the corresponding contactor feedback error is generated. Error generation conditions:
	709
	710	* a command to the charging, precharging, discharging, charging/discharging or main contactor does not match its feedback value.
	711
	712	(% class="box warningmessage" %)
	713	(((
18.1	714	If there is the “Contactor feedback” error, the “Critical error” is generated.
2.1	715	)))
	716
5.1	717	=== Insulation ===
2.1	718
	719	The BMS Main 3 device can detect a physical signal or CAN bus message from an external insulation monitoring device (such as Bender IR155, iso165C, BMD IMD) to monitor the insulation quality.
	720
	721	To change the insulation monitoring parameters, select the "Protections → Insulation" section:
	722
	723	[[image:1733328487098-963.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="121" width="800"]]
	724
	725	In this section:
	726
	727	* Enable – a flag to enable the protection;
	728	* Checking algorithm – isolation checking mode:
	729	** Always on – check is always performed;
	730	** On charging – check is performed only if “Charger connected” or “Charge request” is set;
	731	** Except charging - check is performed only if “Charger connected” and “Charge request” are cleared;
	732	* Delay before setting the error, second;
	733	* Delay before clearing the error, second;
	734	* Lock – a flag to block the error until the device is restarted.
	735
	736	The “Insulation fault” is set if the “Insulation status” signal is detected during the “Delay before setting the error” time. The “Insulation status” signal can be received through the discrete input or by the CAN bus from an insulation monitoring device. The “Insulation fault” is cleared if the “Insulation status” signal is cleared during the “Delay before clearing the error” time.
	737
	738	(% class="box warningmessage" %)
	739	(((
18.1	740	If there is the “Insulation fault”, the “Critical error” is generated.
2.1	741	)))
	742
	743	=== HVIL ===
	744
	745	The BMS Main 3 allows to control the high voltage interlock loop by applying current to a testing loop and monitoring the difference between the measured current and the required value.
	746
	747	To change the HVIL measurement parameters, select the "Protections → HVIL" section:
	748
13.2	749	[[image:1735224839441-185.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="102" width="800"]]
2.1	750
	751	In this section:
	752
	753	* Enable – a flag to enable the protection;
13.2	754	* Source is OFF: Lower current limit, A;
	755	* Source is OFF: Upper current limit, A;
	756	* Source is ON: Lower current limit, A;
	757	* Source is ON: Upper current limit, A;
2.1	758	* Lock – a flag to block the error until the device is restarted.
	759
26.1	760	If interlock loop breaks and its current is out of the configured ranges, the “HVIL error” is generated.
2.1	761
26.1	762	Error clears if interlock loop is being restored.
	763
2.1	764	(% class="box warningmessage" %)
	765	(((
18.1	766	If there is the “HVIL error”, the “Critical error” is generated.
2.1	767	)))
	768
	769	=== Critical error ===
	770
26.1	771	Some of the errors are system critical. A separate signal named "Critical error" indicates a BMS fault.
23.4	772
2.1	773	To change the critical error parameters, select the "Protections → Critical error" section:
	774
	775	[[image:1733328487100-898.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="101" width="800"]]
	776
	777	In this section:
	778
	779	* Enable – a flag to enable the protection;
	780	* Delay before setting the error, millisecond;
	781	* Delay before clearing the error, second;
	782	* Lock – a flag to block the error until the device is restarted.
	783
27.3	784	The "Critical error" signal is generated if at least one of the critical errors (see [[Errors>>doc:Battery management systems.Additional information.1\. Battery controllers\: signals and errors.WebHome\|\|anchor="HErrors"]]) is generated during the “Delay before setting the error” time.
2.1	785
25.1	786	The “Critical error" signal is cleared if there are no errors from the list above during the “Delay before clearing the error” time.
2.1	787
6.1	788	=== General error ===
2.1	789
	790	To change the general error parameters, select the "Protections → Critical error" section:
	791
14.2	792	[[image:1735224942262-497.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="102" width="800"]]
2.1	793
	794	In this section:
	795
	796	* Enable – a flag to enable the protection;
	797	* Delay before setting the error, millisecond;
	798	* Delay before clearing the error, second;
	799	* Lock – a flag to block the error until the device is restarted;
15.1	800	* Errors 1, 2 to set the "Critical error" – bitfields to enable check of corresponding errors.
2.1	801
28.1	802	The “General error”is generated if at least one of the enabled errors is generated during the “Delay before setting the error” time.
2.1	803
	804	The “General error” is cleared if there are no errors from the enabled errors during the “Delay before clearing the error” time.
	805
	806	(% class="box infomessage" %)
	807	(((
20.1	808	The state of the “General error” can be assigned to a discrete output or to a power switch.
2.1	809	)))

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