Dry type Transformer safetyProtection relay connection diagram and features.
1 - Dry type transformer safety and protection:
Protection od Dry type transformer is protection agaist overheating, insulation breakdown, thermaloverload, proper ventilation. Othe activity is also carried out as preventive maintenace, daily cleaning so that dry type transformer could be safe."> Dry type transformer is a caste resin type. It has required only temp protection relay. It has no more required protection as oil type. Different type protection relays available in market. But commonly all are same as function. It has 4nos protection available in this. Protection relay details are given below mentioned.
2- Circuir diagram of protection relay:
3- Function of protection relay
Dry type transformer protection relay is used for mainly temp controller with four type output relay.it is used for three windings and core as single scanner with four outputs.
- Fan control of dry type chamber.
- Max Temp alarm.
- Max temp trip.
- Fault against temp sensors short circuit or open condition.
4- Technical specification of protection relay
| Sr.No. | Parameters | Value |
|---|---|---|
| 1 | Resistance temperature detector) (RTD) sensors: | 4 Nos. |
| 2 | Three no’s control settings: | 1- alarm, 2- trip 3- fan on. |
| 3 | Temp indicating range is: | -20℃ to 300℃. |
| 6 | Temp set point range: | 20℃ to 220℃. |
| 4 | Accuracy: | +/- 1℃. |
| 5 | Supply voltage: | 90 to 270 VAC/DC. |
