DT3000
Instruction Leaflet
I.B. 17555D
Effective: Date 07/02
Page 71
For more information visit:
www.cutler-hammer.eaton.com
Supersedes I.B. 17555C dated November 1999
Table B-2 DT3010 AND DT3020 SPECIFICATIONS AND TEST SUMMARY (CONTINUED)
TIME DELAY SETTINGS:
•
Inverse Time Overcurrent Time Multiplier:
It, I
2
t, I
4
t Curve: 0.2 to 40 [48 settings]
Flat: 0.2 to 2.0 [21 settings]
ANSI (all): 0.1 to 5.0 [50 settings]
IEC (all): 0.025 to 1.00 [40 settings]
•
Short Delay Time:
0.05 to 1.5 sec. [22 settings]
ENVIRONMENT:
•
Environment:
Indoor Use Only, Pollution Degree II, Altitude 2,500m,
Installation Category II
•
Mounting
Location:
Device should be positioned near the main disconnect
•
Operating
temperature:
-30 to +55 Degrees Celsius
•
Operating
Humidity:
0 to 95% Relative Humidity [Non-Condensing]
•
Storage
Temperature:
-40 to +70 Degrees Celsius
AUXILIARY RELAYS:
(Protection Off Alarm and Trip Alarm)
•
Make/Break:
5A @ 120/240Vac & 30Vdc
•
Continuous:
5A @ 120/240Vac
5A @ 30Vdc
ADDITIONAL TESTS:
•
Dielectric
Strength:
Current Inputs: 3,000Vac for 1 minute Phase to Phase
•
Seismic
Test:
Meets requirements for UBC and California Building Code
Zone 4
ZPA = 3.5
COMMUNICATIONS:
•
PowerNet Compatible / Built-in INCOM
•
Data Rate is 1200 or 9600 Baud
•
Set INCOM address from front panel
ZONE SELECTIVE INTERLOCKS:
•
Phase:
Inverse Time Overcurrent and Short Delay
•
Ground:
Inverse Time Overcurrent and Short Delay
Notes: 1. For Ground Pickup < 0.2pu; Time Tolerance ± 15%.
TO BE EFFECTIVE, THE DIGITRIP 3000 WITH
DSPS MUST BE USED WITH A BREAKER HAVING
CAPACITOR TRIP OR OTHER STORED-ENERGY
TRIP MECHANISM THAT CAN OPERATE WHEN
THE AC SUPPLY HAS FAILED.
B3.0 FUNCTIONAL DESCRIPTION
The Dual-Source Power Supply contains 1 ac voltage
transformer and 3 ac current transformers. The ac voltage
transformer is used to supply nominal ac control power to
the unit. The current transformers are used to power the
unit from the line current. Normally, the unit will operate
from the ac auxiliary power. Since this voltage is usually
obtained from the system containing the circuit that the
relay is protecting, a fault on the protected line could cause
the ac voltage to drop below an acceptable operating level
(below approximately 70 volts for DT3010 and 140 volts for
DT3020). All three current transformers secondary are
connected in series to supply this power. The DSPS will
supply enough power to operate the Digitrip 3000
overcurrent relay in the tripped state with currents greater
than 1.8 per unit rated secondary current, or 9A, in a
single- phase. The DSPS will operate with 3-phase
currents in a tripped state with currents greater than 1.2
per unit or 6A rated secondary current.
NOTE: There will be no effect to the DT3000 relay trip
time accuracy when the Dual-Source Power Supply
switches from normal ac voltage to fault-current
power.
B4.0 INSTALLATION
B4.1 PANEL PREPARATION
The dimensions for the cutout, along with the location of
the 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. The Digitrip 3000 with
DSPS dimensions are shown in Figure B-2.
B4.2 MOUNTING THE DIGITRIP 3000 WITH
DUALSOURCE POWER SUPPLY
Once the cutout has been prepared in the panel or switch
gear enclosure, according to Figure 5-1, the Digitrip
3010/3020 can be mounted.
SUPPORT THE PROTECTIVE RELAY FROM THE
FRONT SIDE WHEN MOUNTING. WITHOUT SUCH
SUPPORT, THE PROTECTIVE RELAY COULD
FALL AND CAUSE DAMAGE OR INJURY COULD
RESULT.
Do not use a tap on the face of the relay. Use all self-
tapping screws included with the relay to mount the unit on
the panel.
