Wiki source code of 3.4 Protections

Version 16.46 by Admin on 2024/12/26 15:11

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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
2.1	9	=== Overcurrent ===
1.1	10
	11	The BMS Main 3 device performs the overcurrent protection depending on current sensor values.
	12
	13	To change the overcurrent protection of the battery, select the "Protections → Overcurrent" section:
	14
11.2	15	[[image:1735224601506-488.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="123" width="800"]]
1.1	16
	17	In this section:
	18
	19	* Enable – a flag to enable the protection;
	20	* Maximum charging current, А;
	21	* Tolerant charging current, А;
	22	* Maximum discharging current, А;
	23	* Tolerant discharging current, А;
	24	* Delay before setting the error, millisecond;
	25	* Delay before clearing the error, second;
	26	* Lock – a flag to block the error until the device is restarted.
	27
	28	As a result of operation of the overcurrent protection, the "Overcurrent" error is generated.
	29
	30	Error generation conditions:
	31
	32	* 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;
	33	* 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.
	34
	35	Conditions for removing the error:
	36
	37	* 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;
	38	* 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.
	39
2.1	40	(% class="box infomessage" %)
	41	(((
	42	If there is the "Overcurrent" error, the charging and discharging contactors open.
	43	)))
1.1	44
6.2	45	=== Charge current limit ===
	46
16.21	47	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	48
16.46	49	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	50
16.8	51	To change the overcurrent protection of the battery, select the "Protections → Charge current limit" section:
16.2	52
16.8	53	[[image:1735225207687-430.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="113" width="800"]]In this section:
	54
	55	* Enable – a flag to enable the protection;
16.13	56	* Threshold to switch from Region 1 to Region 2
16.14	57	*
16.8	58
	59
6.2	60	=== Discharge current limit ===
	61
16.46	62	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	63
16.46	64	Current difference is separated two 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	65
	66	To change the overcurrent protection of the battery, select the "Protections → Charge current limit" section:
	67
2.1	68	=== Undervoltage ===
1.1	69
	70	The BMS Main 3 device implements battery protection from too low voltage on the cells.
	71
	72	To change the battery protection parameters from low voltage on the cells, select the "Protections → Undervoltage" section:
	73
8.2	74	[[image:1735224224155-829.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="112" width="800"]]
1.1	75
	76	In this section:
	77
	78	* Enable – a flag to enable the protection;
	79	* Minimum cell voltage, V;
	80	* Tolerant cell voltage, V;
8.4	81	* Check the open circuit voltage instead of the actual voltage – a flag to enable the check of voltage correction due to current and cell resistance;
1.1	82	* Delay before setting the error, millisecond;
	83	* Delay before clearing the error, second;
	84	* Lock – a flag to block the error until the device is restarted.
	85
	86	As a result of the operation of battery protection from low voltage, the "Undervoltage" error is generated.
	87
	88	Error generation conditions:
	89
	90	* 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.
	91
	92	Conditions for removing the error:
	93
	94	* 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.
	95
2.1	96	(% class="box infomessage" %)
	97	(((
	98	If there is the "Undervoltage" error, the discharging contactor opens.
	99	)))
1.1	100
2.1	101	=== Overvoltage ===
1.1	102
	103	The BMS Main 3 device implements battery protection from too high voltage on the cells.
	104
	105	To change the battery protection parameters from high voltage on the cells, select the "Protections → Overvoltage" section:
	106
9.2	107	[[image:1735224377252-473.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="114" width="800"]]
1.1	108
	109	In this section:
	110
	111	* Enable – a flag to enable the protection;
	112	* Maximum cell voltage, V;
	113	* Tolerant cell voltage, V;
8.4	114	* Check the open circuit voltage instead of the actual voltage – a flag to enable the check of voltage correction due to current and cell resistance;
1.1	115	* Delay before setting the error, millisecond;
	116	* Delay before clearing the error, second;
	117	* Lock – a flag to block the error until the device is restarted.
	118
	119	As a result of the operation of the battery protection from high voltage, the "Overvoltage" error is generated.
	120
	121	Error generation conditions:
	122
	123	* 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.
	124
	125	Conditions for removing the error:
	126
	127	* 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.
	128
2.1	129	(% class="box infomessage" %)
	130	(((
	131	If there is the "Overvoltage" error, the charging contactor and discharging contactor open (if the “Switch off the discharging contactor on error” flag is set).
	132	)))
1.1	133
2.1	134	=== Low temperature ===
1.1	135
	136	The BMS Main 3 device implements battery protection from too low temperature.
	137
	138	To change the battery protection parameters from low temperature, select the "Protections → Low temperature" section:
	139
2.1	140	[[image:1733328382382-670.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="137" width="800"]]
1.1	141
	142	In this section:
	143
	144	* Enable – a flag to enable the protection;
	145	* Minimum charge temperature, °C;
	146	* Tolerant charge temperature, °C;
	147	* Minimum discharge temperature, °C;
	148	* Tolerant discharge temperature, °C;
	149	* Delay before setting the error, millisecond;
	150	* Delay before clearing the error, second;
	151	* Lock – a flag to block the error until the device is restarted.
	152
	153	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.
	154
	155	Error generation conditions:
	156
	157	* 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.
	158
	159	Conditions for removing the error:
	160
	161	* 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.
	162
2.1	163	(% class="box infomessage" %)
	164	(((
	165	If there is the "Low temperature (CH)" error, the charging contactor opens.
	166	If there is the "Low temperature (DCH)" error, the discharging contactor opens.
	167	)))
1.1	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	(% class="box infomessage" %)
	199	(((
	200	If there is the "High temperature (CH)" error, the charging contactor opens.
	201	If there is the "High temperature (DCH)" error, the discharging contactor opens.
	202	)))
1.1	203
2.1	204	=== Battery cover ===
1.1	205
	206	To change the protection parameters from opening the battery cover, select the "Protections → Battery cover" section:
	207
2.1	208	[[image:1733328399410-529.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="113" width="800"]]
1.1	209
	210	In this section:
	211
	212	* Enable – a flag to enable the protection;
	213	* Delay before setting the error, millisecond;
	214	* Delay before clearing the error, second;
	215	* Lock – a flag to block the error until the device is restarted.
	216
	217	As a result of the operation of the protection against opening the battery cover, the “Battery cover error” is generated.
	218
	219	Error generation conditions:
	220
	221	* there is a signal from the battery cover during the “Delay before setting the error” time.
	222
	223	Conditions for removing the error:
	224
	225	* no signal from the battery cover during the “Delay before clearing the error” time.
	226
2.1	227	(% class="box warningmessage" %)
	228	(((
	229	If there is the "Battery cover error", the “Critical error” is generated and all contactors open.
	230	)))
1.1	231
2.1	232	=== High humidity ===
1.1	233
	234	The BMS Main 3 can detect that the battery is operating in high humidity conditions.
	235
	236	To change the detection parameters, select the "Protections → High humidity" section:
	237
2.1	238	[[image:1733328399412-184.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="106" width="800"]]
1.1	239
	240	In this section:
	241
	242	* Enable – a flag to enable the detection;
	243	* Maximum humidity, RH%;
	244	* Tolerant humidity, RH%;
	245	* Delay before setting the error, second;
	246	* Delay before clearing the error, second;
	247	* Lock the error until the device is reset.
	248
	249	As a result of the operation of the battery protection from high humidity, the "High humidity" error is generated.
	250
	251	Error generation conditions:
	252
	253	* the measured humidity is greater than “Maximum humidity” during the “Delay before setting the error” time.
	254
	255	Conditions for removing the error:
	256
	257	* the measured humidity is less than the “Tolerant humidity” during the “Delay before clearing the error” time.
	258
2.1	259	(% class="box infomessage" %)
	260	(((
1.1	261	If there is the "High humidity" error, no action is taken. The error is indicative.
2.1	262	)))
1.1	263
2.1	264	=== Water ===
1.1	265
	266	The BMS Main 3 can protect the battery from working in very high humidity conditions.
	267
	268	To change the protection parameters, select the "Protections → Water" section:
	269
2.1	270	[[image:1733328399413-393.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="107" width="800"]]
1.1	271
	272	In this section:
	273
	274	* Enable – a flag to enable the protection;
	275	* Maximum humidity, RH%;
	276	* Tolerant humidity, RH%;
	277	* Delay before setting the error, second;
	278	* Delay before clearing the error, second;
	279	* Lock – lock the error until the device is reset.
	280
	281	As a result of the operation of the battery protection from water, the "Water" error is generated.
	282
	283	Error generation conditions:
	284
	285	* the measured humidity is greater than the “Maximum humidity” value during the “Delay before setting the error” time.
	286
	287	Conditions for removing the error:
	288
	289	* the measured humidity is less than the “Tolerant humidity” value during the “Delay before clearing the error” time.
	290
2.1	291	(% class="box infomessage" %)
	292	(((
	293	If there is the “Water” error, the “Critical error” is generated and all relays open.
	294	)))
1.1	295
6.4	296	=== Logic high temperature ===
1.1	297
	298	To change the overheating protection parameters of BMS Logic devices, select the "Protections → High Logic temperature" section:
	299
2.1	300	[[image:1733328399414-280.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="105" width="800"]]
1.1	301
	302	In this section:
	303
	304	* Enable – a flag to enable the protection;
	305	* Maximum temperature, °C;
	306	* Tolerant temperature, °C;
	307	* Delay before setting the error, second;
	308	* Delay before clearing the error, second;
	309	* Lock – lock the error until the device is reset.
	310
	311	As a result of the operation of the protection from high temperatures of BMS Logic devices, the "High Logic temperature" is generated.
	312
	313	Error generation conditions:
	314
	315	* a BMS Logic device temperature is higher than the “Maximum temperature” value.
	316
	317	Conditions for removing the error:
	318
	319	* a BMS Logic device temperature is less than the “Tolerant temperature” value.
	320
4.1	321	(% class="box infomessage" %)
2.1	322	(((
4.1	323	Cell balancing is disabled on Logic devices with high temperature.
2.1	324	)))
1.1	325
2.1	326	=== Logic offline ===
1.1	327
	328	To change the protection parameters from loss of communication with BMS Logic devices, select the "Protections → Logic offline" section:
	329
2.1	330	[[image:1733328399416-818.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="86" width="800"]]
1.1	331
	332	In this section:
	333
	334	* Enable – a flag to enable the protection;
	335	* Lock – lock the error until the device is reset.
	336
	337	As a result of the protection from loss of communication with BMS Logic devices, the "Logic offline" error is generated.
	338
	339	Error generation conditions:
	340
	341	* at least one of the connected BMS Logic devices does not respond to the commands of the BMS Main device for 10 seconds.
	342
	343	Conditions for removing the error:
	344
	345	* all connected BMS Logic devices respond to the commands of the BMS Main device.
	346
2.1	347	(% class="box warningmessage" %)
	348	(((
	349	If there is the "Logic offline" error, the “Critical error” is generated and all relays open.
	350	)))
	351
	352	=== Cell count ===
	353
	354	To change the protection parameters from the mismatch of the number of cells to the set value, select the "Protections → Cell count" section:
	355
	356	[[image:1733328415731-223.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="97" width="800"]]
	357
	358	In this section:
	359
	360	* Enable – a flag to enable the protection;
	361	* Number of cells – a number of cells connected to the BMS;
	362	* Delay before setting the error, millisecond;
	363	* Delay before clearing the error, second;
	364	* Lock – a flag to block the error until the device is restarted.
	365
	366	As a result of the operation of the protection from the mismatch of the number of cells, the "Cell count error" is generated.
	367
	368	Error generation conditions:
	369
	370	* 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.
	371
	372	Conditions for removing the error:
	373
	374	* the number of cells connected to the BMS is equal to the “Number of cells” value during the “Delay before clearing the error” time.
	375
	376	(% class="box warningmessage" %)
	377	(((
	378	If there is the "Cell count error", the “Critical error” is generated and all relays open.
	379	)))
	380
	381	=== Logic count ===
	382
	383	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:
	384
	385	[[image:1733328415732-163.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="110" width="800"]]
	386
	387	In this section:
	388
	389	* Enable – a flag to enable the protection;
	390	* Logic count – a number of BMS Logic devices connected to the BMS Main;
	391	* 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);
	392	* Lock – lock the error until the device is reset.
	393
	394	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.
	395
	396	Error generation conditions:
	397
	398	* the number of BMS Logic devices connected to the BMS Main is not equal to the “Logic count” value.
	399
	400	Conditions for removing the error:
	401
	402	* the number of BMS Logic devices connected to the BMS Main is equal to the “Logic count” value.
	403
	404	(% class="box warningmessage" %)
	405	(((
	406	If there is the "Logic count error", the “Critical error” is generated and all relays open.
	407	)))
	408
	409	=== Short circuit ===
	410
	411	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.
	412
	413	To change the protection parameters from short circuit, select the "Protections → Short circuit" section:
	414
12.2	415	[[image:1735224667621-969.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="153" width="800"]]
2.1	416
	417	In this section:
	418
	419	* Level 1, 2, 3 – three protection levels. The following parameters are configured at each level:
	420	** Enable – a flag to enable the protection;
	421	** Maximum current, A;
	422	** Delay before setting the error, second;
	423	* Delay before clearing the error, second;
	424	* Lock – a flag to block the error until the device is restarted.
	425
	426	If there is a short circuit, the "Short circuit" error is generated.
	427
	428	Error generation conditions:
	429
	430	* 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.
	431
	432	Conditions for removing the error:
	433
	434	* the current modulo is lower than the “Maximum current” values for all three protection levels during the “Delay before setting the error” time.
	435
	436	(% class="box infomessage" %)
	437	(((
	438	If there is the "Short circuit" error, charging contactor opens (if the “Switch off the charging contactor on error” flag is set) and discharging contactor opens (if the “Switch off the discharging contactor on error flag” is set).
	439	)))
	440
	441	=== High contactor temperature ===
	442
	443	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.
	444
	445	To change the overheating protection parameters of power contactors, select the "Protections → High contactor temperature" section:
	446
12.2	447	[[image:1735224706573-347.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="112" width="800"]]
2.1	448
	449	In this section:
	450
	451	* Enable – a flag to enable the protection;
	452	* Thermistor – a selection of which cell thermistor will be used as contactor temperature sensor;
	453	* Maximum contactor temperature, °C;
	454	* Tolerant contactor temperature, °C;
	455	* Delay before setting the error, second;
	456	* Delay before clearing the error, second;
	457	* Lock – a flag to block the error until the device is restarted.
	458
	459	If there is a contactor overheat, the "High contactor temperature" error is generated.
	460
	461	Error generation conditions:
	462
	463	* the contactor temperature is greater than the “Maximum contactor temperature” value during the “Delay before setting the error” time.
	464
	465	Conditions for removing the error:
	466
	467	* the contactor temperature is lower than the “Tolerant contactor temperature” value during the “Delay before clearing the error” time.
	468
	469	(% class="box infomessage" %)
	470	(((
	471	If there is the "High contactor temperature" error, charging contactor opens (if the “Switch off the charging contactor on error” flag is set) and discharging contactor opens (if the “Switch off the discharging contactor on error” flag is set).
	472	)))
	473
	474	=== Current sensor ===
	475
	476	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.
	477
	478	To change the test parameters of the current sensor connection circuits, select the "Protections → Current sensor" section:
	479
	480	[[image:1733328461552-948.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="128" width="800"]]
	481
	482	In this section:
	483
	484	* Enable – a flag to enable the protection;
	485	* Maximum voltage, V;
	486	* Minimum voltage, V;
	487	* Voltage hysteresis – a hysteresis value to clear the error, V;
	488	* Delay before setting the error, second;
	489	* Delay before clearing the error, second;
	490	* Lock – a flag to block the error until the device is restarted.
	491
	492	If there is an open or short circuit connection of a current sensor, the "Current sensor error" is generated.
	493
	494	Error generation conditions:
	495
	496	* 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;
	497	* 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.
	498
	499	Conditions for removing the error:
	500
	501	* 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.
	502
	503	(% class="box warningmessage" %)
	504	(((
	505	If there is the “Current sensor error”, the “Critical error” is generated and all relays open.
	506	)))
	507
	508	=== Power switch ===
	509
	510	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:
	511
	512	[[image:1733328461554-241.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="99" width="800"]]
	513
	514	In this section:
	515
	516	* Delay before clearing the error, second;
	517	* Lock – a flag to block the error until the device is restarted.
	518
	519	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.
	520
	521	(% class="box warningmessage" %)
	522	(((
	523	If there is the "Power switch error", the “Critical error” is generated and all relays open.
	524	)))
	525
6.4	526	=== Power fault ===
	527
	528	TBA
	529
2.1	530	=== Charge contactor cycles ===
	531
	532	The BMS Main 3 device protects the charging contactor against frequent switching.
	533
	534	To change the protection parameters against high frequency switching of the charging contactor, select the "Protections → Charge contactor cycles" section:
	535
	536	[[image:1733328461555-351.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="124" width="800"]]
	537
	538	In this section:
	539
	540	* Enable – a flag to enable the protection;
	541	* Cycles threshold – a number of cycles in a given period, upon which the “CH contactor cycles error” is generated;
	542	* Check time – a time in which the BMS counts switching cycles of the charging contactor, second;
	543	* Delay before setting the error, millisecond;
	544	* Delay before clearing the error, second;
	545	* Lock – a flag to block the error until the device is restarted.
	546
	547	If there is a high switching frequency of the charging contactor, the “CH contactor cycles error” is generated.
	548
	549	Error generation conditions:
	550
	551	* 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.
	552
	553	Conditions for removing the error:
	554
	555	* the “Delay before clearing the error” time has passed since the error was generated.
	556
	557	(% class="box infomessage" %)
	558	(((
	559	If there is the "CH contactor cycles error" error, the charging contactor opens.
	560	)))
	561
3.1	562	=== Discharge contactor cycles ===
2.1	563
	564	The BMS Main 3 device protects the discharging contactor against frequent switching.
	565
	566	To change the protection parameters against high frequency switching of the discharging contactor, select the "Protections → Discharging contactor cycles" section:
	567
	568	[[image:1733328461560-301.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="123" width="800"]]
	569
	570	In this section:
	571
	572	* Enable – a flag to enable the protection;
	573	* Cycles threshold – a number of cycles in a given period, upon which the “DCH contactor cycles error” is generated;
	574	* Check time – a time in which the BMS counts switching cycles of the charging contactor, second;
	575	* Delay before setting the error, millisecond;
	576	* Delay before clearing the error, second;
	577	* Lock – a flag to block the error until the device is restarted.
	578
	579	If there is the high switching frequency of the discharging contactor, the “DCH contactor cycles error” is generated.
	580
	581	Error generation conditions:
	582
	583	* 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.
	584
	585	Conditions for removing the error:
	586
	587	* the “Delay before clearing the error” time has passed since the error was generated.
	588
	589	(% class="box infomessage" %)
	590	(((
	591	If there is the "DCH contactor cycles error" error, the discharging contactor opens.
	592	)))
	593
	594	=== Temperature sensors ===
	595
	596	The BMS Main 3 device checks the temperature sensors connection circuits. The circuits are checked for breakage and short-circuit.
	597
	598	To change the protection parameters of the temperature sensors circuits, select the "Protections → Temperature sensors" section:
	599
	600	[[image:1733328471918-980.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="102" width="800"]]
	601
	602	In this section:
	603
	604	* Enable – a flag to enable the protection;
	605	* Delay before setting the error, millisecond;
	606	* Delay before clearing the error, second;
	607	* Lock – a flag to block the error until the device is restarted.
	608
	609	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.
	610
	611	(% class="box warningmessage" %)
	612	(((
4.1	613	If there is the “No temp. sensors” or “Temp. sensor is shorted” error, the “Critical error” is generated and all relays open.
2.1	614	)))
	615
	616	=== WDT reset ===
	617
	618	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.
	619
	620	To change the parameters of the watchdog protection, select the "Protections → WDT reset" section:
	621
	622	[[image:1733328471919-183.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="101" width="800"]]
	623
	624	In this section:
	625
	626	* Enable – a flag to enable the protection;
	627	* Delay before clearing the error, second;
	628	* Lock – a flag to block the error until the device is restarted.
	629
	630	Conditions for removing the error:
	631
	632	* the “Delay before clearing the error” time has passed from the device startup.
	633
	634	(% class="box warningmessage" %)
	635	(((
	636	If there is the "WDT reset" error, the “Critical error” is generated and all relays open.
	637	)))
	638
4.1	639	=== Unallowable charging ===
2.1	640
	641	The BMS can detect that the battery is charging through the discharging circuit and protectively open the discharging contactor to prevent unallowable battery operation.
	642
	643	To change the parameters of the unallowable charging protection, select the "Protections → Unallowable charging" section:
	644
	645	[[image:1733328471920-923.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="97" width="800"]]
	646
	647	In this section:
	648
	649	* Enable – a flag to enable the protection;
	650	* Delay before setting the error, second;
	651	* Delay before clearing the error, second;
	652	* Lock – a flag to block the error until the device is restarted.
	653
	654	If there is charging the battery through the discharging circuit detected, the "Unallowable charging" error is generated.
	655
	656	Error generation conditions:
	657
	658	* the charging contactor is open, and the battery current is not zero during the “Delay before setting the error” time.
	659
	660	Conditions for removing the error:
	661
	662	* the battery current is zero during the “Delay before clearing the error” time.
	663
	664	(% class="box infomessage" %)
	665	(((
	666	If there is the "Unallowable charging" error, the discharging contactor opens.
	667	)))
	668
5.1	669	=== Stuck contactor ===
2.1	670
	671	The BMS Main 3 device protects contactors against sticking.
	672
	673	To change the protection parameters against sticking, select the "Protections → Stuck contactor" section:
	674
	675	[[image:1733328471920-314.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="123" width="800"]]
	676
	677	In this section:
	678
	679	* Enable – a flag to enable the protection;
	680	* Delay before setting the error, millisecond;
	681	* Delay before clearing the error, second;
	682	* Check voltage – a flag to enable checking of voltage before and after contactors to detect the fact of contactor sticking;
	683	* Abnormal voltage difference – the difference of voltages before and after contactors at which BMS indicates and error;
	684	* Lock – a flag to block the error until the device is restarted.
	685
	686	If there is a stuck contactor, the “Stuck contactor” error is generated. Error generation conditions:
	687
	688	* 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”.
	689
	690	(% class="box warningmessage" %)
	691	(((
	692	If there is the “Stuck contactor” error, the “Critical error” is generated and all relays open.
	693	)))
	694
	695	=== Contactor feedback ===
	696
	697	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.
	698
	699	To change the contactor feedback check parameters, select the "Protections → Contactor feedback" section:
	700
	701	[[image:1733328487096-144.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="109" width="800"]]
	702
	703	In this section:
	704
	705	* Enable – a flag to enable the protection;
	706	* Delay before setting the error, millisecond;
	707	* Delay before clearing the error, second;
	708	* Lock – a flag to block the error until the device is restarted.
	709
	710	If there is a discrepancy at any contactor, the corresponding contactor feedback error is generated. Error generation conditions:
	711
	712	* a command to the charging, precharging, discharging, charging/discharging or main contactor does not match its feedback value.
	713
	714	(% class="box warningmessage" %)
	715	(((
	716	If there is the “Contactor feedback” error, the “Critical error” is generated and all relays open.
	717	)))
	718
5.1	719	=== Insulation ===
2.1	720
	721	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.
	722
	723	To change the insulation monitoring parameters, select the "Protections → Insulation" section:
	724
	725	[[image:1733328487098-963.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="121" width="800"]]
	726
	727	In this section:
	728
	729	* Enable – a flag to enable the protection;
	730	* Checking algorithm – isolation checking mode:
	731	** Always on – check is always performed;
	732	** On charging – check is performed only if “Charger connected” or “Charge request” is set;
	733	** Except charging - check is performed only if “Charger connected” and “Charge request” are cleared;
	734	* Delay before setting the error, second;
	735	* Delay before clearing the error, second;
	736	* Lock – a flag to block the error until the device is restarted.
	737
	738	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.
	739
	740	(% class="box warningmessage" %)
	741	(((
	742	If there is the “Insulation fault”, the “Critical error” is generated and all relays open.
	743	)))
	744
	745	=== HVIL ===
	746
	747	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.
	748
	749	To change the HVIL measurement parameters, select the "Protections → HVIL" section:
	750
13.2	751	[[image:1735224839441-185.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="102" width="800"]]
2.1	752
	753	In this section:
	754
	755	* Enable – a flag to enable the protection;
13.2	756	* Source is OFF: Lower current limit, A;
	757	* Source is OFF: Upper current limit, A;
	758	* Source is ON: Lower current limit, A;
	759	* Source is ON: Upper current limit, A;
2.1	760	* Lock – a flag to block the error until the device is restarted.
	761
14.2	762	If interlock loop breaks and its current is out of the configured ranges, the “HVIL error” is generated. Error clears if interlock loop is being restored.
2.1	763
	764	(% class="box warningmessage" %)
	765	(((
	766	If there is the “HVIL error”, the “Critical error” is generated and all relays open.
	767	)))
	768
	769	=== Critical error ===
	770
	771	To change the critical error parameters, select the "Protections → Critical error" section:
	772
	773	[[image:1733328487100-898.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="101" width="800"]]
	774
	775	In this section:
	776
	777	* Enable – a flag to enable the protection;
	778	* Delay before setting the error, millisecond;
	779	* Delay before clearing the error, second;
	780	* Lock – a flag to block the error until the device is restarted.
	781
	782	The critical error flag is generated if at least one of the following errors is generated during the “Delay before setting the error” time:
	783
	784	* “Battery cover error”;
	785	* “Water”;
	786	* “Logic offline”;
	787	* “Cell count error”;
	788	* “ADC error”;
	789	* “Current sensor error”;
	790	* “Shunt offline”;
	791	* “Shunt error”;
	792	* “WDT reset”
	793	* “No temp. sensors”;
	794	* “Temperature sensor shorted”;
	795	* “Stuck contactor”;
	796	* “CH contactor feedback error”;
	797	* “DCH contactor feedback error”;
	798	* “Insulation fault”;
	799	* “PCH contactor feedback error”;
	800	* “CH/DCH contactor feedback error”;
	801	* “Main contactor feedback error”;
	802	* “High voltage fault”;
	803	* “Power switch error”;
	804	* “HVIL error”l
	805	* “Power fault”.
	806
	807	The “Critical error” is cleared if there are no errors from the list above during the “Delay before clearing the error” time.
	808
	809	(% class="box infomessage" %)
	810	(((
	811	If there is the “Critical error”, all contactors open.
	812	)))
	813
6.1	814	=== General error ===
2.1	815
	816	To change the general error parameters, select the "Protections → Critical error" section:
	817
14.2	818	[[image:1735224942262-497.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="102" width="800"]]
2.1	819
	820	In this section:
	821
	822	* Enable – a flag to enable the protection;
	823	* Delay before setting the error, millisecond;
	824	* Delay before clearing the error, second;
	825	* Lock – a flag to block the error until the device is restarted;
15.1	826	* Errors 1, 2 to set the "Critical error" – bitfields to enable check of corresponding errors.
2.1	827
	828	The general error flag is generated if at least one of the enabled errors is generated during the “Delay before setting the error” time.
	829
	830	The “General error” is cleared if there are no errors from the enabled errors during the “Delay before clearing the error” time.
	831
	832	(% class="box infomessage" %)
	833	(((
	834	The state of the “General error” can be output to a discrete output or a power switch.
	835	)))

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