Instruction Leaflet
DT3000
Page 32
Effective: Date 07/02
I.B. 17555D
For more information visit:
www.cutler-hammer.eaton.com
Supersedes I.B. 17555C dated November 1999
SECTION 5: INSTALLATION, STARTUP AND TESTING
5-1 INTRODUCTION
This section describes mounting, wiring, startup and
miscellaneous testing details associated with the Digitrip
3000 Protective Relay.
INSURE THAT THE INCOMING AC POWER AND
FOREIGN POWER SOURCES ARE TURNED OFF
AND LOCKED OUT BEFORE PERFORMING ANY
WORK ON THE DIGITRIP 3000 TRIP UNIT OR ITS
ASSOCIATED EQUIPMENT. FAILURE TO
OBSERVE THIS PRACTICE COULD RESULT IN
EQUIPMENT DAMAGE, SERIOUS INJURY AND/OR
DEATH.
5-2 PANEL PREPARATION
This section describes the panel preparation and mounting
of the Digitrip 3000 Protective Relay. If you are using the
Digitrip 3001 Drawout Relay please refer to Appendix A. If
you using the Digitrip 3000 Dual Source Power Supply
(DSPS) addition please refer to Appendix B.
5-2.1 CUTOUT
Since the Digitrip 3000 Protective Relay is typically
mounted on a cabinet door, it is necessary to prepare a
cutout in which it will be placed. The dimensions for this
cutout, along with the location of the six mounting holes,
are shown in Figure 5-1.
Before actually cutting the panel, be sure that the required
3-dimensional clearances for the relay chassis allow
mounting in the desired location. Digitrip 3000 Protective
Relay dimensions are shown in Figure 5-2. It is necessary
to hold the tolerances shown when making the cutouts and
placing the holes for the mounting screws. In particular, the
horizontal dimensions between the center of the mounting
holes and the vertical edge of the cutout must be within 0
and +0.050 in. (0.13 cm).
5-2.2 MOUNTING
Do not use a tap on the face of the relay since this will
remove excessive plastic from the holes, resulting in less
threaded material to secure the relay to it mounting panel.
Place the Digitrip 3000 Protective Relay through the cutout
in the panel. Be sure the Operator Panel faces outward.
Use the 0.38 in. (0.9 cm) long screws included with the
relay to mount the unit on a single-thickness panel.
Be sure to start the screws from INSIDE the panel, so they
go through the metal first.
Fig. 5-1 Cutout Dimensions (Inches)
5-3 REPLACING DIGITRIP MV WITH DIGITRIP 3000
The Digitrip 3000 can be installed as a direct replacement
for the Digitrip MV with proper DIP switch settings as
shown in Table 5.1. The following five points must be
considered when configuring a Digitrip 3000 to function as
a Digitrip MV.
1. DIP switches S1, S2 and S3 must be set to the OFF
position.
2. The selected curve shape must be It, I
2
t, I
4
t or FLAT.
3. The phase and ground curves must be set the same.
4. The Ct settings must be set from the front panel. They
cannot be set via IMPACC.
5. The thermal curves are only used for system
coordination.
WARNING
