SHORT CIRCUIT AND OVERLOAD PROTECTION FOR ALL DEVICES
(Conforming to the IEC60947-4-2 and UL508)
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 short-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
Solid State Contactor
Protection by Thermal Magnetic Circuit Breaker
Nominal Motor
Current
0.40-0.63 A
0.63-1 A
1-1.6 A
1.6-2.5 A
2.5-4 A
4-6.3 A
6.3-10 A
Thermal Magnetic Circuit Breaker
(Schneider Electric)
GV2ME04 / GV2P04
GV2ME05 / GV2P05
GV2ME06 / GV2P06
GV2ME07 / GV2P07
GV2ME08 / GV2P08
GV2ME10 / GV2P10
GV2ME14 / GV2P14
Solid State Contactor
2 controlled legs
DRC3Pxxx4xxx2
DRC3Pxxx4xxx2
DRC3Pxxx4xxx2
DRC3Pxxx4xxx2
DRC3Pxxx4xxx2
DRC3Pxxx4xxx2
DRC3Pxxx4xxx2 (up to 7.6A)
Solid State Contactor
3 controlled legs
DRC3Pxxx4xxx
DRC3Pxxx4xxx
DRC3Pxxx4xxx
DRC3Pxxx4xxx
DRC3Pxxx4xxx
DRC3Pxxx4xxx (up to 4.8A)
-
Solid State Contactor
Reversing
DRC3Rxxx4xx
DRC3Rxxx4xx
DRC3Rxxx4xx
DRC3Rxxx4xx
DRC3Rxxx4xx
DRC3Rxxx4xx
DRC3Rxxx4xx (up to 7.6A)
Protection by overload relays and fuses
Nominal Motor
Current
0.40-0.63 A
0.63-1 A
1-1.6 A
1.6-2.5 A
2.5-4 A
4-6.3 A
6.3-10 A
Overload Relay
(Schneider Electric)
LRD04
LRD05
LRD06
LRD07
LRD08
LRD10
LRD14
Class gG fuses
(example from Littlefuse)
CY14X51G16
CY14X51G16
CY14X51G25
CY14X51G25
CY14X51G25
CY14X51G40
CY14X51G40
Solid State Contactor
2 controlled legs
DRC3Pxxx4xxx2
DRC3Pxxx4xxx2
DRC3Pxxx4xxx2
DRC3Pxxx4xxx2
DRC3Pxxx4xxx2
DRC3Pxxx4xxx2
DRC3Pxxx4xxx2 (up to 7.6A)
Solid State Contactor
3 controlled legs
DRC3Pxxx4xxx
DRC3Pxxx4xxx
DRC3Pxxx4xxx
DRC3Pxxx4xxx
DRC3Pxxx4xxx
DRC3Pxxx4xxx (up to 4.8A)
-
Solid State Contactor
Reversing
DRC3Rxxx4xx
DRC3Rxxx4xx
DRC3Rxxx4xx
DRC3Rxxx4xx
DRC3Rxxx4xx
DRC3Rxxx4xx
DRC3Rxxx4xx (up to 7.6A)
Type of coordination 2
Protection by overload relays and fuses
Nominal Motor Overload Relay
Semiconductor fuses with less than 1621A2S
Solid State Contactor
(Schneider Electric) Littlefuse SIBA (Cylindric) Ferraz (Cylindric) 2 controlled legs
Current
0.40-0.63 A
0.63-1 A
1-1.6 A
1.6-2.5 A
2.5-4 A
4-6.3 A
6.3-10 A
LRD04
LRD05
LRD06
LRD07
LRD08
LRD10
LRD14
LA50QS40-4
LA50QS40-4
LA50QS40-4
LA50QS40-4
LA50QS40-4
LA50QS40-4
LA50QS40-4
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
DRC3Pxxx4xxx2
DRC3Pxxx4xxx2
DRC3Pxxx4xxx2
DRC3Pxxx4xxx2
DRC3Pxxx4xxx2
DRC3Pxxx4xxx2
DRC3Pxxx4xxx2 (up to 7.6A)
Solid State Contactor
3 controlled legs
DRC3Pxxx4xxx
DRC3Pxxx4xxx
DRC3Pxxx4xxx
DRC3Pxxx4xxx
DRC3Pxxx4xxx
-
Solid State Contactor
Reversing
DRC3Rxxx4xx
DRC3Rxxx4xx
DRC3Rxxx4xx
DRC3Rxxx4xx
DRC3Rxxx4xx
DRC3Rxxx4xx (up to 7.6A)
DRC3Pxxx4xxx (up to 4.8A) DRC3Rxxx4xx
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.
All the Schneider Electric Overload relay LRD family is fully mechanical compatible with the DRC contactor without the need of any adapter.
The DRC Series can accept the LAD7C1 module (pre-wiring kit allowing direct connection of the NC contact of relay LRD to the contactor)
When the LAD7C1 module is used, the common terminal for the control input is not anymore the ”A2” terminal of DRC but it is the “96” terminal of the overload relay.
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