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2CDE165001R2011 ABB E236-US1.1D Undervoltage Relay 1CO with Switch-On Delay
ABB E236-US1.1D is a three-phase undervoltage monitoring relay with a fixed 195 V threshold, 5% hysteresis, adjustable 6 second to 10 minute switch-on delay and one changeover contact for 3N 400/230 V AC systems.
£113.25
Why Choose the ABB E236-US1.1D Undervoltage Relay?
The ABB E236-US1.1D is a compact undervoltage monitoring relay with adjustable switch-on delay designed to supervise three-phase AC supplies and provide a changeover output when abnormal voltage conditions occur. As part of the ABB E236 voltage monitoring series, it provides dependable supply supervision for switchgear, distribution boards and building electrical installations.
The E236-US1.1D monitors all three phases relative to the neutral conductor and features a fixed 195 V switching threshold with 5% fixed hysteresis. Unlike the standard E236-US1.1, this D variant incorporates an adjustable switch-on delay from 6 seconds to 10 minutes, allowing the output relay to remain delayed after normal voltage conditions have been restored.
Designed for 3N 400/230 V AC systems, the E236-US1.1D provides one changeover contact (1CO) and visual LED indication of monitoring and relay status. Its compact 17.5 mm single-module housing mounts on a standard 35 mm DIN rail, making it suitable for professional low-voltage protection and control installations.
Key Advantages
- Reliable three-phase undervoltage monitoring for low-voltage electrical systems.
- 195 V fixed switching threshold with 5% hysteresis.
- Adjustable 6 second to 10 minute switch-on delay.
- One changeover contact (1CO) for signalling and control circuits.
- LED indication provides clear monitoring and output-relay status.
- Compact 17.5 mm single-module DIN rail design.
Key Features
- ABB E236 undervoltage monitoring relay series.
- 3N 400/230 V AC measuring system.
- 195 V fixed undervoltage threshold.
- 5% fixed hysteresis.
- 6 second to 10 minute adjustable switch-on delay.
- One changeover contact (1CO).
- Green LED for voltage/time-delay indication.
- Yellow LED for output-relay status indication.
- 35 mm DIN rail mounting.
Reliable Undervoltage Monitoring with Delayed Pick-Up
Undervoltage monitoring relays supervise electrical supplies and provide a control signal when voltage falls below a defined level. When all monitored phase voltages on the E236-US1.1D exceed the 195 V switching threshold including hysteresis, the adjustable time delay begins before the output relay energises.
If one of the monitored phase voltages subsequently falls below the switching threshold, the output relay de-energises. This combination of three-phase voltage monitoring, fixed undervoltage threshold and adjustable delayed pick-up makes the E236-US1.1D suitable for applications where equipment should not restart immediately following restoration of the supply.
Typical Applications
- Three-phase low-voltage distribution systems.
- Electrical switchgear and distribution boards.
- Building power and safety supply installations.
- Industrial control panels.
- Undervoltage alarm and signalling circuits.
- Delayed restart and supply restoration control.
Technical Specifications
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| Mounting Type | DIN rail | |
|---|---|---|
| Series | E236 | |
| ABB order code | 2CDE165001R2011 | |
| Product type | Undervoltage monitoring relay | |
| Output contact | 1CO changeover contact | |
| Measuring system | 3N, 400/230 V AC | |
| Switching threshold | 195 V | |
| Hysteresis | 5%, fixed | |
| Switch-on delay | 6 s–10 min, adjustable | |
| Release delay | 200 ms | |
| Rated voltage | 250 V | |
| Maximum switching capacity | 1250 VA | |
| Protection rating | IP20 | |
| Mounting type | 35 mm DIN rail | |
| Width in modular spacings | 1 | |
| Width | 17.5 mm | |
| Height | 87 mm | |
| Depth | 60 mm | |
| Mounting depth | 68 mm | |
| Weight | approx. 0.068 kg | |
| Housing colour | Grey, RAL 7035 | |
| EAN | 4016779651790 |
Frequently Asked Questions
What is the ABB E236-US1.1D used for?
The ABB E236-US1.1D is used to monitor three-phase AC supplies for undervoltage conditions and provide a delayed changeover relay output when normal voltage conditions are established.
What is the switching threshold of the E236-US1.1D?
The E236-US1.1D has a fixed switching threshold of 195 V with 5% fixed hysteresis.
What is the switch-on delay range of the ABB E236-US1.1D?
The switch-on delay is adjustable from 6 seconds to 10 minutes, allowing delayed energisation of the output relay after the monitored voltage returns to the required level.
What output contact does the E236-US1.1D provide?
The relay provides one changeover contact (1CO) for connection to external signalling, control or protection circuits.
How is the ABB E236-US1.1D installed?
The E236-US1.1D is designed for 35 mm DIN rail mounting and occupies one 17.5 mm modular spacing in a distribution board or control panel.
Trusted ABB Voltage Monitoring
ABB E236 undervoltage monitoring relays provide dependable supervision of electrical supplies, with the E236-US1.1D adding adjustable delayed pick-up for applications requiring controlled restoration of downstream electrical equipment.
