DANGER!
For hot commissioning and retrofits, good communication is essential. Respect all limitations from the
system owner or operator. Always check before touching or changing any existing wiring.
1.2.3 Controller power supply
If the controller has no power supply, it is OFF and does not provide any protection to the system. The controller cannot
enforce any trip, block, or latch when it is off. All the controller relays de-energise.
The controller must have a reliable power supply, which must include a backup power supply. In addition, the switchboard
design must ensure that the system is sufficiently protected if the controller power supply fails.
1.2.4 Factory settings
The controller is delivered pre-programmed from the factory with a set of default settings. These settings are based on typical
values and may not be correct for your system. You must therefore check all parameters before using the controller.
1.2.5 Electrostatic discharge
You must protect the equipment terminals from static discharge during handling, including installation and dismounting. Once
the equipment is correctly installed and the frame ground is connected, it is no longer necessary to protect the terminals from
static discharge.
1.2.6 Safety during installation and operation
Installing and operating the equipment may require work with dangerous currents and voltages. The installation must only be
carried out by authorised personnel who understand the risks involved in working with electrical equipment.
DANGER!
Hazardous live currents and voltages. Do not touch any terminals, especially the AC measurement inputs
and the relay terminals. Touching the terminals could lead to injury or death.
1.2.7 Shelving and taking alarms out of service
DANGER!
Shelved and out of service alarms are completely disabled. These alarms cannot be activated by the
operating conditions, and provide NO protection. Note: Shelving or taking out of service also automatically
acknowledges the alarm and resets the latch.
It is possible to shelve and/or take selected alarms out of service. However, only qualified personnel should shelve and/or
take alarms out of service. This must be done carefully, and only as a temporary measure, for example, during
commissioning.
1.2.8 Do not manually override active alarm actions
DANGER!
Do not use switchboard or manual control to override the alarm action of an active alarm.
An alarm may be active because it is latched, or because the alarm condition is still present. If the alarm action is manually
overridden, a latched alarm does not do its alarm action again. In this situation, the latched alarm does not provide protection.
GPU 300 Commissioning guidelines 4189341033 UK
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