1 1
S V E R K E R 7 5 0 / 7 6 0
P r o g r a m m a E l e c t r i c A B
Z P - C D 0 1 E R 0 5 A
3.3 Timer
Since the timer has a start input and a stop input, it
can be used to measure external cycles as well as
sequences initiated by Sverker. The measured time
appears in the display window.
To test automatic reclosing devices, Sverker is able
to measure a number of sequential time intervals
and display the results later.
The inputs can be set individually to respond either
to zero-potential contact operation or to a voltage
(AC or DC).
Input state indicators
At each timer START and STOP input there is an
input state indicator lamp that indicates the state of
the input. When the indicator lamp is lighted, it
indicates either a closed circuit (for contact mode)
or the presence of a voltage (for voltage mode).
These indicators permit you to (for example) check
the circuits involved before starting a test sequence.
Start conditions
The timer can be started in the following ways:
Indication
Start condition
INT
a) When an internal start occurs, i.e. for
a test sequence started by Sverker
(ON+TIME or OFF+TIME).
b) When a voltage is applied to the
start input or when a contact is closed.
c) When a voltage applied to the start
input vanishes or when a contact is
opened.
+
d) When the state of the input changes.
Stop conditions
The timer can be stopped in the following ways:
Indication
Stop condition
INT
a) When an outgoing current is inter
rupted (internal detection).
b) When a voltage is applied to the stop
input or when a contact is closed.
c) When a voltage applied to the stop
input vanishes or when a contact is
opened.
+
d) When the state of the input changes.
Measuring an external cycle
Before measuring, Sverker must be set to the
ON+TIME state, whereupon the timer will also be
cleared to zero.
Clearing the timer
The timer will be cleared to zero when generation
starts again.
Testing automatic reclosing
devices
A setting must be made via the display window
before you can test automatic reclosing devices.
ON+TIME is lighted throughout the entire cycle.
Generation starts again each time the timer’s start
input is activated.
Summary of Contents for Programma Sverker 750
Page 1: ...SVERKER 750 760 User s manual Relay Test Unit ...
Page 28: ...2 9 S V E R K E R 7 5 0 7 6 0 P r o g r a m m a E l e c t r i c A B Z P C D 0 1 E R 0 5 A ...
Page 75: ...7 6 S V E R K E R 7 5 0 7 6 0 P r o g r a m m a E l e c t r i c A B Z P C D 0 1 E R 0 5 A ...
Page 76: ...Subject to change without notice Printed matter ZP CD01E R05B 2007 ...