| Test specimens |
| High voltage circuit breaker | Current Transformer |
| Disconnecting switch | Cable |
| Earthing switch | Bushing |
| Bus | Reactor |
| Surge arrester | Transformer |
| Load switch | Resister |
| Terminal | Relay |
| Fuse | Semi-conductor |
| Switchboard | DC circuit breaker |
| Potential transformer | Low voltage circuit breaker |
| On load tap changer | |