8
15kV Class Padmount VisoVac™
instruction manual
MN024004EN April 2021
Rating
plug
24 character
LED display
LSIG mimic
curve
Cause of
trip LED
Manual
selection
Real-time
LED
Figure 17 . Digitrip 1150 V controller
The Digitrip 1150 V trip unit can provide the following
protection and metering functions:
●
51 – Phase Long Delay
●
50T – Phase Short Delay
●
50 – Phase Instantaneous
●
51/50G – Ground Fault
●
37 – Phase Loss (Current Based)
●
46 – Current Unbalance
●
27 – Undervoltage*
●
59 – Overvoltage*
●
81U – Underfrequency*
●
81O – Over Frequency*
●
47 – Voltage Unbalance*
●
32 – Reverse Power*
●
Thermal Memory – analyses the thermal loading of VFI
●
Metering - I, V, kVA, kVAR, kW, THD, PF
*Voltage sensors are required for power and voltage related functions.
S-trip
Close
Motor
Trip
Actuator
DIGITRIP
Digitrip
Close
Handle
(Local Close
Pos
Handle
(Local
Open Pos
Ground
(GRD2)
Aux
(B contact)
Aux
(A contact)
Isolation
(ISO3B)
Isolation
(ISO3A)
Handle
(“Remote” Pos)
Remote
(Close sw)
Remote
(Open sw)
Spring
charge
Circuit
120 VAC
Figure 18 . V3 Switchgear control schematic with
Digitrip .
Eaton CH-Type current sensors are provided on ways using
the Digitrip 1150 V. CH-Type sensors come standard with
1 A secondaries and are available with the following primary
current ratings: 100A, 200A, 250A, 300A, 400A, 6060A,
630A, 800A, 1000A, 1200A.
For more information about the Digitrip 1150 V, please see
the following link:
https://www.eaton.com/content/dam/
eaton/products/electrical-circuit-protection/medium-voltage-
vacuum-circuit-breakers/mv-vcp-t-vacuum-circuit-breakers/
digitrip-models-1150v-and-1150vi-trip-units-for-type-vcp-t-vcp-
tr-medium-voltage-breakers-il66a7535h02.pdf.
Control Power Transformer (CPT)
Control power is supplied through a CPT upon request.
Please see the
“Appendix”
for associated product literature
and switchgear wiring schematics for CPT details. See
Figure 19
for equipment access detail.
Current Transformers (CT)
Current transformers are used for current measurement
for protection, control, and metering. When a Digitrip
1150 V relay is provided, it is supplied with a rating plug
and matching CH-Type Eaton current transformers. See the
Digitrip 1150 V link provided above for details.
