SHORT CIRCUIT AND OVERLOAD PROTECTION FOR ALL DEVICES

IEC standard 60947-4-1 make a distinction between two different types of protection, (called “coordination”), which are designated types “1” and "2".

Any short-circuit that occurs is cleared safely by either type of coordination.

The only difference between the 2 categories concerns the extent of the SSR damage caused by the short-circuit.

Type "1" coordination requires that in the event of a sh

ort-circuit, the Solid State Contactor does not endanger personnel or installations,

but permanent damage to the SSC is permissible. In this case the SSC may need to be replaced. For this type of co-ordination,

the use of fusing or circuit breakers adequate to protect the system and wiring from short circuits, (but not specifically considering SSC protection), can be used.

Type "2" coordination requires that under a short-circuit condition, the circuit is interrupted, the SSC does not endanger persons or installations,

and in addition the SSR will be able to operate after the fault condition is repaired.

Type of coordination 1

Note: All the Schneider Electric Thermal magnetic circuit breakers GV2 family (GV2ME and GV2P) is fully mechanical compatible with the DRC contactor using the GV2AF3 connection block.

Protection by overload relays and fuses

Nominal Motor

Current

Overload Relay

(Schneider Electric)

Class gG fuses

(example from Littlefuse)

Solid State Contactor

2 controlled legs

Solid State Contactor

3 controlled legs

Solid State Contactor

Reversing

0.40-0.63 A

LRD04

CY14X51G16

DRC3Pxx4x2

DRC3Pxx4x

DRC3Rxx4x

0.63-1 A

LRD05

CY14X51G16

DRC3Pxx4x2

DRC3Pxx4x

DRC3Rxx4x

1-1.6 A

LRD06

CY14X51G25

DRC3Pxx4x2

DRC3Pxx4x

DRC3Rxx4x

1.6-2.5 A

LRD07

CY14X51G25

DRC3Pxx4x2

DRC3Pxx4x

DRC3Rxx4x

2.5-4 A

LRD08

CY14X51G25

DRC3Pxx4x2

DRC3Pxx4x

DRC3Rxx4x

4-6.3 A

LRD10

CY14X51G40

DRC3Pxx4x2

DRC3Pxx4x(up to 4.8A)

DRC3Rxx4x

6.3-10 A

LRD14

CY14X51G40

DRC3Pxx4x2 (up to 7.6A)

-

DRC3Rxx4x (up to 7.6A)

(18)

Type of coordination 2

Protection by overload relays and fuses

Nominal Motor

Current

Overload Relay

(Schneider Electric)

Semiconductor fuses with less than 1621A2S

Littlefuse

Solid State Contactor

2 controlled legs

Solid State Contactor

3 controlled legs

Solid State Contactor

Reversing

0.40-0.63 A

LRD04

LA50QS40-4

DRC3Pxx4x2

DRC3Pxx4x

DRC3Rxx4x

0.63-1 A

LRD05

LA50QS40-4

DRC3Pxx4x2

DRC3Pxx4x

DRC3Rxx4x

1-1.6 A

LRD06

LA50QS40-4

DRC3Pxx4x2

DRC3Pxx4x

DRC3Rxx4x

1.6-2.5 A

LRD07

LA50QS40-4

DRC3Pxx4x2

DRC3Pxx4x

DRC3Rxx4x

2.5-4 A

LRD08

LA50QS40-4

DRC3Pxx4x2

DRC3Pxx4x

DRC3Rxx4x

4-6.3 A

LRD10

LA50QS40-4

DRC3Pxx4x2

DRC3Pxx4x (up to 4.8A)

DRC3Rxx4x

6.3-10 A

LRD14

LA50QS40-4

DRC3Pxx4x2 (up to 7.6A)

-

DRC3Rxx4x (up to 7.6A)

(18)

All the Schneider Electric Overload relay LRD family is fully mechanical compatible with the DRC contactor without the need of any adapter.

0.40-0.63 A

GV2ME04 / GV2P04

DRC3Pxx4x2

DRC3Pxx4x

DRC3Rxx4x

0.63-1 A

GV2ME05 / GV2P05

DRC3Pxx4x2

DRC3Pxx4x

DRC3Rxx4x

1-1.6 A

GV2ME06 / GV2P06

DRC3Pxx4x2

DRC3Pxx4x

DRC3Rxx4x

1.6-2.5 A

GV2ME07 / GV2P07

DRC3Pxx4x2

DRC3Pxx4x

DRC3Rxx4x

2.5-4 A

GV2ME08 / GV2P08

DRC3Pxx4x2

DRC3Pxx4x

DRC3Rxx4x

4-6.3 A

GV2ME10 / GV2P10

DRC3Pxx4x2

DRC3Pxx4x (up to 4.8A)

DRC3Rxx4x

6.3-10 A

GV2ME14 / GV2P14

DRC3Pxx4x2 (up to 7.6A)

-

DRC3Rxx4x (up to 7.6A)

Nominal Motor

Current

Thermal Magnetic Circuit Breaker

(Schneider Electric)

Solid State Contactor

2 controlled legs

Solid State Contactor

3 controlled legs

Solid State Contactor

Reversing

(Conforming to the IEC60947-4-2 and UL508)

The DRC Series can accept the LAD7C1 module (pre-wiring kit allowing direct connection of the NC contact of relay LRD to the contactor)

50.058.06.40

50.058.06.40

50.058.06.40

50.058.06.40

50.058.06.40

50.058.06.40

50.058.06.40

A093909

A093909

A093909

A093909

A093909

A093909

A093909

SIBA (Cylindric) Ferraz (Cylindric)

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Datasheet

DIN Rail Mount