Switch DisconnectorABB OT630E03 630A 3-Pole Switch-Disconnector
The OT630E03 is a 3-pole, front-operated, base-mounted switch-disconnector rated at 630A, designed for main isolation duty in power distribution panels. Supplied with a terminal bolt kit but without handle and shaft (ordered separately), it delivers robust switching and isolation performance for heavy-duty electrical installations across UAE commercial and industrial facilities.
Key Features
- 630A rated conventional thermal current for reliable isolation in high-current distribution circuits
- Front-operated mechanism with base mounting for straightforward panel integration
- High rated insulation voltage of 1000V and impulse withstand voltage of 12kV for robust dielectric performance
- Rated short-circuit making capacity of 80kA at 690V for demanding fault conditions
- Genuine ABB quality — proven OT-series switch-disconnector platform
Technical Specifications
| Specification |
Details |
| Brand |
ABB |
| Model |
OT630E03 |
| Rated Current (Ith) |
630A |
| Poles |
3P |
| Rated Operational Voltage |
1000V |
| Rated Insulation Voltage (Ui) |
1000V |
| Rated Short-Circuit Making Capacity (Icm) |
80kA at 690V |
| Mounting |
Base Mounting |
| Terminal Type |
Lug Terminals |
| Degree of Protection |
IP00 (front, uncovered) |
Applications
- Main incomer isolation in low voltage switchboards for commercial and industrial buildings
- Load break switching and isolation in power distribution panels across the UAE
- Generator and transformer circuit isolation for maintenance safety
- Heavy-duty panel builds requiring high fault-current withstand capability
FAQ
-
Is this an MCB or an isolator?
It's an isolator (switch-disconnector), not an MCB. It has no overload or short-circuit protection — it only provides a manual on/off disconnect, and should be paired with separate MCBs or RCCBs for circuit protection.
-
Where should this isolator be installed?
Typically as the main incoming switch or a local isolation point ahead of the MCBs/RCCBs in a distribution board, so the whole board (or a section of it) can be isolated for maintenance without needing to trip individual breakers.
-
Can I install this myself?
No. This is trade-only distribution board equipment and must be installed and connected by a licensed electrician in accordance with local wiring regulations.
-
Can this isolator be used to switch a live circuit under load?
Isolators rated for on-load switching can do this within their utilisation category, but check the specific AC rating in the Technical Specifications table — an isolator is not a protective device and should not substitute for a circuit breaker.
