Spares for substation equipment: isolators, CT / PT parts, lightning arresters, fuses and breaker components.
Every field is optional - tell us what you know and we will confirm the rest in the quotation.
Representative image. The actual product, make and appearance depend on the supplier and your specification.
Substation spares depend on voltage class, so first note the system voltage (for example 11 kV or 33 kV), the fault level and whether the equipment is indoor or outdoor. Parts of an isolator, a CT, a PT or a lightning arrester are not interchangeable across ratings.
Inspect for pollution, tracking and corroded contacts during outages, and plan shutdowns around DISCOM approvals where they apply. See current transformers and potential transformers for instrument transformers, and substation equipment for complete substation equipment. Work must be carried out under a permit by qualified staff.
Ratings, dimensions and certification are confirmed against your enquiry. Use Send an enquiry and our engineers will respond within 24 hours.
System voltage, equipment type and maker, rating and serial number from the nameplate, and photographs or drawings of the part. For CTs and PTs, also give the ratio, class and burden. Mention any DISCOM or inspection requirement so the parts supplied suit your approval route.
It is usually better to replace all three phases together, as arresters age with exposure and a mixed set can behave unevenly. Follow your maintenance policy and the manufacturer's guidance. Check older units for signs of damage at the same visit, as that tells you how aged they are.
A CT with the wrong ratio, class or burden causes wrong readings or relay misoperation. Always match the old CT's secondary current, ratio and class unless the protection scheme is being redesigned. If the burden or ratio must change, an engineer should review the protection and metering settings.
| Spare Type | Substation parts |
|---|---|
| Applies To | Outdoor and indoor substations |
| Selection Basis | Make, model and rating |
| Supply | Ex-stock or sourced to order |
Spares for drive and control panels: contactors, relays, fuses, power supplies, fans and control components.
Spares for electric motors: bearings, shafts, fans, terminal boxes, slip rings, brushes and windings.
On requestProtection, control and timing relays for motors, feeders, transformers and generators.
Spares for low-voltage switchgear: breakers, contactors, trip units, auxiliaries, busbar parts and indicating devices.
