Time Electronics
User Manual
7088D Adjustable AC Power Supply Module
v1.1
7088D Adjustable AC Power Supply Module
Page 4 of 10
1
Introduction
1.1
Description
The 7088D provides variable 50Hz AC power up to 10A. The output voltage and current is
monitored on two digital meters with 4 digit resolution and bar graph display. Output connection
is via a front panel mains socket (type selectable when placing order), or via 4mm safety
terminals. The output is protected by a 10A circuit breaker. Further protection is provided a front
panel fuse. The output voltage is adjustable by turning the front panel control knob. An
independent incoming power switch is also provided. The 7088D is not isolated from the mains
supply so the highest output voltage is dependent upon the mains line voltage (ie 265V at 240V
input, 121V at 110V input).
The 7088D’s method of achieving a variable AC supply is by means of using a variable voltage
auto-transformer.
This provides a trouble free and an efficient way of varying/controlling AC voltages. Variation of
the output voltage is achieved by a brush arm with a carbon tip, which rotates around a silver
plated commutator.
The mains socket type on the 7088D is selected by the user. These include UK 13A, Euro
Schuko 16A, US 15A, and Indian Round Pin 15A. The type must be specified on ordering.
Additionally the module has 4mm shrouded sockets for use.