ABB OTP63T3M Enclosed Safety Switch
The OTP63T3M is a 3-pole enclosed safety switch rated at 63A, housed in a rigid glass-reinforced polycarbonate enclosure with IP65 protection. Fitted with a mounted auxiliary contact for remote status signaling, it is built for both indoor and outdoor use, offering reliable local isolation for machinery and distribution circuits across the UAE.
Key Features
- 3-pole safety switch rated 63A (AC-22A) with fixed neutral and PE terminal for 5-wire system installations
- Mounted auxiliary contact (1NO) included for remote status signaling and control interlocking
- IP65-rated glass-reinforced polycarbonate enclosure, UV protected, suitable for outdoor and indoor mounting
- Padlockable selector handle accommodating up to three padlocks, with defeatable interlocked cover for thermographic inspection
- Genuine ABB quality — impact-resistant housing rated IK08
Technical Specifications
| Specification |
Details |
| Brand |
ABB |
| Model |
OTP63T3M |
| Number of Poles |
3P |
| Rated Operational Current (Ie) AC-21A/AC-22A |
63A (380–690V) |
| Rated Operational Current (Ie) AC-23A |
63A (380–415V) |
| Rated Operational Voltage |
750V (main circuit) |
| Rated Insulation Voltage (Ui) |
750V |
| Rated Operational Power AC-23A (400V) |
30kW |
| Rated Short-Circuit Making Capacity (Icm) |
3.6kA at 690V |
| Rated Short-Time Withstand Current (Icw) |
2.5kA for 1s |
| Mounted Auxiliary Contacts |
1 NO, 0 NC |
| Degree of Protection |
IP65 (IEC 60529) |
| Impact Resistance |
IK08 |
| Enclosure Material |
Glass-reinforced polycarbonate |
| Handle Type |
Selector, padlockable (up to 3 padlocks), black |
| Neutral Type |
Fixed neutral |
| Cable Cross-Section |
10 – 70 mm² |
| Cable Entry Position |
Top/Bottom, 2xM32+M16 per side |
| Terminal Type |
Screw terminals |
| Tightening Torque |
6 N·m |
| Standards |
IEC 60947-1, IEC 60947-3 |
| Net Weight |
0.84 kg |
| Dimensions (W x H x D) |
145 x 200 x 90 mm |
| Note |
Product nearing end-of-life; ABB replacement model is OTP63GT3M |
Applications
- Local isolation for HVAC units, pumps, and outdoor machinery requiring remote status feedback
- Main isolation switch for external distribution boards exposed to UAE outdoor conditions
- Safe isolation point for maintenance on rooftop and plant room equipment
- Feeder isolation in FM-managed facilities requiring IP65-rated enclosures with auxiliary signaling
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.
-
What does 3-pole mean for this isolator?
3-pole means it switches all three phases on a three-phase supply.
-
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.
