Motor Protector

ELV□-M Series Motor Protection Circuit Breaker

The ELV□-M series Motor Protection Circuit Breakers provide integrated overload and short-circuit protection for motors operating from 0.1 to 80A in AC 50/60Hz systems up to 660V. They support direct motor starting and stopping under AC3 loads, covering power ranges such as 1 to 55kW at 380V. Available in ELV2, ELV3, and ELV4 sub-series with finely graded current settings from 0.1-0.16A up to 20-32A, these breakers also offer phase imbalance protection and are operated via a knob or push button for versatile industrial use.

Product Details

Product Descriprion

The ELV□-M series motor protection circuit breakers are designed for AC 50/60Hz circuits with voltages up to 660V and currents from 0.1A to 80A. They deliver triple protection by integrating overload and short-circuit protection for motors under AC3 loads, enabling direct full-voltage motor starting, and providing fault protection for circuits and equipment within power distribution systems. These breakers are widely used in industrial motor control applications such as fans and pumps, as well as in global grid environments requiring voltage compatibility from 220V to 660V.

Electrical specifications support multiple voltages including 220V, 380V, 415V, 440V, 500V and 660V, with current ratings spanning 0.1A to 80A to match standard motor power levels across voltages. The breakers support frequent start-stop operations and incorporate optimized overload balance protection for varying load conditions. For critical performance parameters such as breaking capacity, users should refer to the product manual.

Application

ELV□-M series motor protection circuit breakers is mainly used for the overload and short circuit protection of the motor in AC 50/60Hz,up to 660V,0.1-80A power circuit,as a full voltage starter to start and cut off the motor,under the AC3 load or for the overload and short circuit protection of the circuit and power equipment in the power distribution network.

Specifications

Type	Rated or scale of rated current(A)	Rated standard power of 3-phase motors 50/60Hz in category AC-3
		220V	380V	415V	440V	500V	660V
		KW	KW	KW	KW	KW	KW
ELV2-M01	0.1-0.16	--	--	--	--	--	--
ELV2-M02	0.16-0.25	--	--	--	--	--	--
ELV2-M03	0.25-0.4	--	--	--	--	--	--
ELV2-M04	0.4-0.63						0.37
ELV2-M05	0.63-1				0.37	0.37	0.55
ELV2-M06	1-1.6		0.37		0.55	0.75	1.1
ELV2-M07	1.6-2.5	0.37	0.75	0.75	1.1	1.1	1.5
ELV2-M08	2.5-4	0.75	1.5	1.5	1.5	2.2	3
ELV2-M10	4-6.3	1.1	2.2	2.2	3	3.7	4
ELV2-M14	6-10	2.2	4	4	4	5.5	7.5
ELV2-M16	9-14	3	5.5	5.5	7.5	7.5	9
ELV2-M20	13-18	4	7.5	9	9	9	11
ELV2-M21	17-23	5.5	11	11	11	11	15
ELV2-M22	20-25	5.5	11	11	11	15	18.5
ELV2-M32	24-32	7.5	15	15	15	18.5	26
ELV3-M06	1-1.6	--	0.37	--	0.55	0.75	1.1
ELV3-M07	1.6-2.5	0.37	0.75	1.1	1.1	1.1	1.5
ELV3-M08	2.5-4	0.75	1.5	1.5	1.5	2.2	3
ELV3-M10	4-6	1.1	2.2	2.2	3	3.7	4
ELV3-M14	6-10	2.2	4	4	4	5.5	7.5
ELV3-M20	10-16	4	7.5	7.5	7.5	10	11
ELV3-M25	16-25	5.5	11	11	11	15	18.5
ELV3-M40	25-40	11	18.5	22	22	25	33
ELV3-M63	40-63	15	30	33	33	40	55
ELV3-M80	56-80	22	40	45	45	55	63

Type		230/240V		400/415V		440V		500V		690V
ELV2-M		Icu	Ics %(1)	Icu	Ics %(1)	Icu	Ics %(1)	Icu	Ics %(1)	Icu	Ics %(1)
	A	KA		KA		KA		KA		KA
01-06	01-06	-	-	-	-	-	-	-	-	-	75
07	2.5	-	-	-	-	-	-	-	-	3	75
08	4	-	-	-	-	-	-	-	-	3	75
10	6.3	-	-	-	-	50	100	50	100	3	75
14	10	-	-	100	-	10	100	10	100	3	75
16	14	-	-	15	50	8	50	6	75	3	75
20	18	-	-	15	50	8	50	6	75	3	75
21	23	50	100	15	40	6	50	4	75	3	75
22	25	50	100	15	40	6	50	4	75	3	75
32	32	50	100	10	50	6	50	4	75	3	75

Type		230/240V		400/415V		440V		500V		690V
ELV2-M		aM	gl	aM	gl	aM	gl	aM	gl	aM	gl
	A	A	A	A	A	A	A	A	A	A	A
01-06	01-06	-	-	-	-	-	-	-	-	-	-
07	2.5	-	-	-	-	-	-	-	-	36	20
08	4	-	-	-	-	-	-	-	-	25	32
10	6.3	-	-	-	-	50	63	50	63	32	40
14	10	-	-	-	-	50	63	50	63	32	40
16	14	-	-	63	80	50	63	50	63	40	50
20	18	-	-	63	80	50	63	50	63	40	50
21	23	80	100	80	100	63	80	50	63	40	50
22	25	80	100	80	100	63	80	50	63	40	50
32	32	80	100	80	100	63	80	50	63	40	50

Operation performance for motor protection circuit breaker

Serial no.

Rated current Inm(A)

Operating cycle frequency(times/h)

Operating cycle

electric life(times0

Mechanical life(times)

overall( times)

ELV2-M

120

2000

10000

1200

ELV3-M

120

2000

10000

1200

Overload balance characteristics

Step

no.

Test current(A)

Start situation

Limited time

Pre-engage

result

Ambient air temperature

1.05

Cold state

t≥2h

Non-trip

□20℃±2℃

1.2

hot state(The current rise

steadily to a fixed value

after step 1)

t<2h

trip

□20℃±2℃

1.5

It starts after the heat balance of 1.0In current

trip 10A t<2 min

trip

□20℃±2℃

grade 10 t<4min

trip

□20℃±2℃

7.2

Cold state

trip 10A 2s<t≤10s

trip

□20℃±2℃

grade 104s≤t≤10

trip

□20℃±2℃

Overload non-balance characteristics

Step

no.

Test current (A)

Start situation

Limited

time

Pre-engage

result

Ambient air temperature

Two phases

Third-phase

1.0

0.9

Cold state

t≥2h

Non-trip

□20℃±2℃

1.15

hot state(The current rise

steadily to a fixed value

after step 1)

t<2h

trip

□20℃±2℃

Features

1. Wide-Range Precision Protection:
Operates in AC 50/60Hz power circuits up to 660V voltage and 0.1-80A current range. This motor protection circuit breaker delivers dual overload and short-circuit protection for motors, covering equipment from micro to medium-large current applications.

2. High Durability & Long Lifespan:
The 120A model (ELV2-M/ELV3-M) achieves 10,000 electrical operations, 10,000 mechanical operations, and a combined lifespan of 12,000 cycles. This performance specification satisfies high-frequency industrial operation demands.

3. Multifunctional Integrated Application:
Functions as a full-voltage motor starter under AC-3 loads to control motor start/stop operations. Simultaneously protects distribution network circuits and power equipment against overload and short-circuit conditions, consolidating multiple functionalities into a single device.

4. Rigorous Overload Performance Verification:
Comprehensive testing validates reliability through balanced characteristics across 1.05In to 7.2In current ranges with cold/hot state response times measured to minute-level precision, plus unbalanced characteristic verification under abnormal conditions including two-phase 0.9In + one-phase 1.0In operation. All performance tests were conducted at controlled 20℃±2℃ ambient temperature.