Brand: ABB
Category: Other
Document Type: Manual
Language: EN
Manual for UniGear ZS1
Uploaded: Nov. 21, 2025, 7:01 p.m.
Warranty Information
Warranty information is not explicitly stated in the provided pages.
The UniGear ZS1 is a three-phase, metal-clad, air-insulated switchgear suitable for indoor applications up to 24 kV. It features a single busbar system with withdrawable modules equipped with circuit-breakers and contactors. The panels are designed for high voltage applications, adhering to IEC standards and offering protection degrees of IP4X for the enclosure and IP2X for partitions. The manual details installation, service, and maintenance procedures, including technical data, panel design, operation, maintenance intervals, and repair procedures. It emphasizes safety during operation and maintenance, highlighting hazardous voltage warnings and proper procedures for handling electrical equipment.
Troubleshooting and error codes
| Problem | Possible cause | Remedy |
|---|---|---|
| Note: For detailed troubleshooting, consult the specific operating manuals for individual components like circuit-breakers, switch-disconnectors, etc. | ||
| The following are general checks related to interlocks and operational sequences. | ||
| Withdrawable part cannot be moved from test/disconnected to service position. | • Circuit-breaker is not off. • Earthing switch is on. |
• Switch off the circuit-breaker. • Switch off the earthing switch. |
| Circuit-breaker cannot be switched on. | • Withdrawable part is not in test or service position. | • Move the withdrawable part to the test or service position. |
| Control wiring plug cannot be connected/disconnected. | • Withdrawable part is not in test/disconnected position. | • Move the withdrawable part to the test/disconnected position. |
| Earthing switch cannot be switched on. | • Withdrawable part is in service position. | • Move the withdrawable part to the test/disconnected position or remove it from the panel. |
| Withdrawable part cannot be moved from test/disconnected to service position when earthing switch is on. | • Earthing switch is closed. | • Open the earthing switch. |
| Door of the lower cable HV part cannot be opened. | • Earthing switch is not on. | • Close the earthing switch. |
| Apparatus compartment door cannot be opened. | • Apparatus (circuit-breaker/contactor) is in service or undefined position. | • Move apparatus to test/disconnected position. |
| Earthing switch cannot be operated. | • Cable compartment door is open. | • Close the cable compartment door. |
| Busbar earthing switch cannot be closed. | • Not all withdrawable parts in the busbar section are in test/disconnected position. | • Ensure all withdrawable parts are in the test/disconnected position. |
| Locking magnet YO does not allow movement of withdrawable part. | • Control power failure or absence of control power. | • Do not forcibly move the part. Release the locking magnet by disengaging the armature. |
| Earthing switch cannot be operated when withdrawable part is in test/disconnected position. | • Slide 14.2 is not pressed down. | • Press slide 14.2 down to the opening position. |