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WEG Molded Case Circuit Breakers - User’s Manual
3
Digitrip RMS 310 trip units
Trip unit
maximum
rating
Amperes
Fixed
rating
plug
Amperes
Adjustable rating plug
Amperes
AWG
wire
range
Adjustable short time delay
Pick-up
setting
range
1)
Time delay
l
2
t ramp
(standard)
Independently adjustable
setting time (optional)
2500
1600
2000/2500
2 to 6
X
l (no intencional delay)
2000
1600/2000/2500
100/200/300 M. Sec.
2500
Table 1:
available trip unit rating plug ratings and trip unit settings
Note: 1) The current pick-up setting is a multiple of the fixed rating plug value or setting of the adjustable rating plug.
2. INSTALLATION
The installation procedure consists of inspecting the circuit breaker and, as
applicable, installing the trip unit and rating plug, accessories, and terminals;
mounting the circuit breaker; connecting the line and load conductors; and torquing
terminals. Circuit breakers, rating plugs, accessories, mounting hardware, and
unmounted terminals may be supplied in separate packages. To install the circuit
breaker, perform the following steps.
Note: if required, internal accessory installation in any type of circuit breaker should be done before the circuit
breakerismounted and connected. Refer to individual accessory instruction leaflets.
1. Make sure that the circuit breaker is suitable for the intended installation
by comparing nameplate data with existing equipment ratings and system
requirements. Inspect the circuit breaker for completeness, and check for
damage before mounting.
2. Remove cover screws and cover.
Notes: The breaker is equipped with a cover interlock feature,sothat when the cover is removed, the breaker will
trip and cannot be reset or operated until the cover is replaced and screwed down securely.
Instructions for installing the trip unit rating plug and accessories in the UBW2500 circuit breaker are
supplied with each item.
3. If not already installed, mount trip unit rating plug and accessories (if required)
in circuit breaker frame.
4. Re-install cover and secure with pan-head screws provided. Torque cover
screws to 24 in-lbs.
5. If not already installed, mount terminals as shown in Figure 2 or Figure 3. If
warning label is supplied with the terminal, place on upper portion of circuit
breaker cover.
