Using a contactor with a Powermesh switch
When wiring a Powermesh Multi Purpose switch ( PMMPSxxx) to a contactor, the use of an RC Suppressor module is highly recommended as a safeguard. The RC Suppressor will normalise current spikes and maintain a more stable voltage level that can be caused by these inductive loads which could potentially damage the switch.
Please note this product is not DIY! Installation must only be installed by a LICENSED ELECTRICIAN to local wiring regulations. Failure to follow these instructions can result in serious injury or death.
Typical Wiring Schematic
Recommended application
The R-C snubber suppressor should be applied as below, i.e. install across the coil of the contactor.
Contactors Tested with Powermesh Switches
The table below lists 5 common contactors that have been tested with the Powermesh switch range. Using the NHP or ABB models listed below do not require the addition of the RC Suppressor.
| Item No. | Brand. | Part No. | Amp Rating | No. of Poles | Requires External RC Suppressor |
| 1 | Hager | ESC125 | 25A | 1 | YES |
| 2 | Hager | ESC240 | 40A | 2 | YES |
| 3 | Clipsal | 4CNT4-40 | 40A | 4 | YES |
| 4 | NHP Terasaki | CTX4040230U | 40A | 4 | NO |
| 5 | ABB | ESB40-40 | 40A | 4 | NO |
Tested RC suppressors
The Table below lists 2 suitable RC suppressors that have been tested with the Powermesh switch range
1)
| Part Description |
R-C Snubber Inductive Load Suppressor
|
| Brand | Okaya |
| Manufacturer |
Okaya Electric America Inc
|
| Part No. | XEB0471 |
| R Value | 47 ohms |
| C Value | 0.1uf |
| Connection Type | flylead |
| Unit Cost | ~$20 |
2)
| Part Description |
R-C Mains Protector
|
| Brand | RS Components |
| Manufacturer | |
| Part No. | RS240-393 |
| R Value | 100 ohms |
| C Value | 0.1uf |
| Connection Type | DIN rail |
| Unit Cost | ~$20 |