Technical information

Page 38
The T680 power changeover unit derives power
for the T880 and T881 control panels. The unit
takes primary power from the ship's AC supply
and provides a standby supply from the ship's
24Vd.c. system i.e. the unit does not charge any
internal batteries. The T680 unit provides a
smooth changeover from primary to secondary
supply and vice-versa. It signals main and
standby supply failure signals to the T88x control
equipment. It also incorporates a dimming circuit
for the lamps of the controller.
The interface to the control panel is made with a
six core connection. The unit is approved by a
variety of marine authorities
Technical Specification
Operating temp.: -25°C to +70°C
Storage temp.: -25°C to +70°C
Humidity: 95% RH non-condensing
Mains Supply: 120/240Va.c. ± 20%
at 50/60Hz
Standby Supply: 24Vd.c. (must not exceed
32Vd.c.)
The T680 unit is normally mounted onto a
bulkhead using the H frame bracket. A bezel for
19" rack mounting is available. The housing has
two removable gland plates (top and bottom) for
cable access.
Housing is zinc plated 1.6mm thick mild steel to
BS 1706 ZN3.
Finish is zinc plated and painted to P.S.
121.121.022.
Dimensions: 267H x 398W x 150D mm
Ingress Protection: IP53
Weight: 17Kg (with bracket)
13.5Kg (without bracket)
Product Codes
508.013.016
T680 Power changeover unit
509.013.026
T680 Spares kit
Manual - UHM3 “Marine Fire Manual”
T680 Marine Power Change Over Unit