3 4
T O R K E L 8 2 0 / 8 4 0 / 8 6 0
P r o g r a m m a E l e c t r i c A B
Z P - B S 0 6 E R 1 0 1
13
How to obtain the
desired current
TORKEL load
capacity
The following tables present the TORKEL built-in cur-
rent limitation (Imax) and also the resistance of the
built-in resistance elements for the different voltage
ranges.
TORKEL 820
Range Max
current
(Imax)
Internal
resistance
(nominal)
Lowest volt-
age at which
Imax can be
obtained
1)
10-27.6 V 270 A 0.069 W 21.3 V
10-55.2 V 270 A 0.138 W 39.9 V
1) Requires use of two standard cables,
3
m (10 ft), 70mm2 (1.5 mΩ).
TORKEL 840/860
Range Max
current
(Imax)
Internal
resistance
(nominal)
Lowest volt-
age at which
Imax can be
obtained
2)
10 - 27.6 V 110 A 0.165 W 20.8 V
10 - 55.2 V 110 A 0.275 W 32.9 V
10 - 144 V 110 A 0.550 W 63.1 V
10 - 288 V 55 A 3.3 W 184 V
2) Requires use of two standard cables,
3
m (10 ft) / 25 mm
2
, (4 mΩ).
Calculating current
General
You must make some simple calculations before start-
ing a test to find out whether or not TORKEL will be
able to provide the desired load current. You must
also make certain that TORKEL will be able to sustain
this current until the test ends. TORKEL regulates cur-
rent by lowering its internal resistance as the voltage
drops. However, the resistance elements built into
TORKEL impose a limit beneath which further lowering
is impossible.
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