GE Industrial Solutions ProTrip Trip Units for Low-Voltage - Manual (Page 10)

ProTrip™ Trip Units
Chapter 1. Introduction
4
Ground-Fault Protection
Ground-fault protection with ProTrip Trip Units is pro-
vided in the rating plug. The pickup and delay settings
available with the switches on the rating plug are
described in Chapter 2, Trip Unit Setup.
1–6 Equipment Interfaces
ProTrip Trip Units do not usually require connections
within the equipment, since all wiring is contained within
the circuit breaker. The only connection is for the neutral
sensor, which uses a special dedicated disconnect.
CAUTION: Neutral current sensors are required for
single-phase, three-wire and three-phase, four-wire
systems. When the Trip Unit is connected to a three-
phase, three-wire system, the neutral sensor terminals of
the breaker are left open. Do not short any neutral
current sensor terminals in a three-phase, three-wire
system, as this could result in damage to, or malfunction
of, the electrical system.
ATTENTION: Un transformateur de courant de neutre
est nécessaire pour les réseaux 3 phases + neutre. Si le
neutre n’est pas distribué, les bornes de neutre du
déclencheur doivent être laissées ouvertes. Ne pas les
court-circuiter (ceci peut endommager le déclencheur et
entrainer un mauvais fonctionnement du système
électrique.
1–7 Trip Unit Information
Trip Unit Label Information
Following are descriptions of the various numbers on the
front of the Trip Unit, as shown in Figure 1.
• Top-left corner – Serial number of the Trip Unit, such
as RMS71234567 .
• Top-right corner – Date of manufacture code, such as
P1121= .
• Right center above rating plug – Catalog number of the
Trip Unit, such as PK050D3F1608R .
• Right center, below catalog number – Current sensor
rating in amperes.
There are two more labels on the Trip Unit that are not
generally visible when it is plugged into a breaker.
• Side of unit – Bar code giving the catalog number of
the Trip Unit.
• Rear of unit – Yellow caution label.
Selector Switches
The following selector switches are present on the front of
the Trip Unit. See Chapter 2, Setup Mode, for a complete
description of each function.
• Long-time pickup
• Long-time delay
• Short-time pickup
• Short-time delay
• Instantaneous pickup
• Ground-fault pickup (on the rating plug)
• Ground-fault delay (on the rating plug)