Easy UPS 3S 208 V UL for Internal Batteries
UPS Systems
Earthing Principles
5/2021
Solid Grounding 4-Wire - Single Mains without Maintenance Bypass Panel
This diagram illustrates the earthing connections for a single mains input without a maintenance bypass panel, using a solid grounding 4-wire system.
Components:
- Service Entrance Panel Mains
- Upstream UIB
- UPS
- Output Panel
- Load
Connections:
- EGC (Equipment Grounding Conductor) connections are shown between all components.
- Mains input and UPS output are connected.
- Load is connected to the UPS output.
Solid Grounding 4-Wire - Dual Mains Without Maintenance Bypass Panel
This diagram shows the earthing for a dual mains input system without a maintenance bypass panel, utilizing a solid grounding 4-wire configuration.
Components:
- Service Entrance Panel Mains
- Service Entrance Panel Bypass
- Upstream UIB
- Upstream SSIB
- UPS
- Output Panel
- Load
Connections:
- EGC connections are present throughout the system.
- Dual mains inputs and UPS output are shown.
- Note A: In a dual mains system, if a neutral cable is not available in the mains, connect the neutral of the mains and bypass at the entrance panel, as indicated by the dotted line.
Solid Grounding 4-Wire - Single Mains With Maintenance Bypass Panel
This diagram details the earthing for a single mains input system that includes a maintenance bypass panel, employing a solid grounding 4-wire method.
Components:
- Service Entrance Panel Mains
- Upstream UIB
- SSIB
- MBB
- UPS
- UOB
- Wall Mount MBP
- Load
Connections:
- EGC connections are routed between components.
- Mains input, bypass input, and UPS output are depicted.
- Load is connected to the UPS output.
Solid Grounding 4-Wire - Dual Mains With Maintenance Bypass Panel
This diagram illustrates the earthing configuration for a dual mains input system with a maintenance bypass panel, using a solid grounding 4-wire approach.
Components:
- Service Entrance Panel Mains
- Service Entrance Panel Bypass
- Upstream UIB
- Upstream SSIB
- SSIB
- MBB
- UPS
- UOB
- Wall Mount MBP
- Load
Connections:
- EGC connections are shown throughout the system.
- Dual mains inputs, bypass input, and UPS output are illustrated.
- Note A: In a dual mains system, if a neutral cable is not available in the mains, connect the neutral of the mains and bypass at the entrance panel, as indicated by the dotted line.
Resistance Grounding 4 wire-Single Mains Without Maintenance Bypass Panel (Note B)
This diagram presents the earthing for a single mains input system without a maintenance bypass panel, using a resistance grounding 4-wire system. Specific notes apply to this configuration.
Components:
- Service Entrance Panel Mains
- Upstream UIB
- UPS
- Output Panel
- Load
Connections:
- EGC connections are shown.
- Mains input and UPS output are connected.
- Load is connected to the UPS output.
- Note B:
- 1. UPS does not support a resistance grounding system without neutral.
- 2. Upstream circuit breaker must be 4-pole in a resistance grounding system.
- 3. UPS must be completely shut down during maintenance in a resistance grounding system.
Resistance Grounding 4 wire-Dual Mains Without Maintenance Bypass Panel (Note B)
This diagram illustrates the earthing for a dual mains input system without a maintenance bypass panel, employing a resistance grounding 4-wire system. Specific notes are provided.
Components:
- Service Entrance Panel Mains
- Service Entrance Panel Bypass
- Upstream UIB
- Upstream SSIB
- UPS
- Output Panel
- Load
Connections:
- EGC connections are present throughout.
- Dual mains inputs and UPS output are shown.
- Note A: In a dual mains system, if a neutral cable is not available in the mains, connect the neutral of the mains and bypass at the entrance panel, as indicated by the dotted line.
- Note B:
- 1. UPS does not support a resistance grounding system without neutral.
- 2. Upstream circuit breaker must be 4-pole in a resistance grounding system.
- 3. UPS must be completely shut down during maintenance in a resistance grounding system.
Resistance Grounding 4-Wire - Single Mains With Maintenance Bypass Panel (Note B)
This diagram details the earthing for a single mains input system with a maintenance bypass panel, using a resistance grounding 4-wire method. Important notes are included.
Components:
- Service Entrance Panel Main
- Upstream UIB
- SSIB
- MBB
- UPS
- UOB
- Wall Mount MBP
- Load
Connections:
- EGC connections are routed between components.
- Mains input, bypass input, and UPS output are depicted.
- Load is connected to the UPS output.
- Note B:
- 1. UPS does not support a resistance grounding system without neutral.
- 2. Upstream circuit breaker must be 4-pole in a resistance grounding system.
- 3. UPS must be completely shut down during maintenance in a resistance grounding system.
Resistance Grounding 4-Wire - Dual Mains With Maintenance Bypass Panel (Note B)
This diagram illustrates the earthing configuration for a dual mains input system with a maintenance bypass panel, employing a resistance grounding 4-wire system. Specific notes are provided.
Components:
- Service Entrance Panel Mains
- Service Entrance Panel Bypass
- Upstream UIB
- Upstream SSIB
- SSIB
- MBB
- UPS
- UOB
- Wall Mount MBP
- Load
Connections:
- EGC connections are shown throughout the system.
- Dual mains inputs, bypass input, and UPS output are illustrated.
- Note A: In a dual mains system, if a neutral cable is not available in the mains, connect the neutral of the mains and bypass at the entrance panel, as indicated by the dotted line.
- Note B:
- 1. UPS does not support a resistance grounding system without neutral.
- 2. Upstream circuit breaker must be 4-pole in a resistance grounding system.
- 3. UPS must be completely shut down during maintenance in a resistance grounding system.
