Commander SE Advanced User Guide
147
Issue Number: 4
The information to be entered into parameters
10.30
Maximum full power braking time
and
10.31
Maximum full power
braking period
for the protection of these resistors is given in the following tables. It can be seen that the ON time at 780VDC
on certain resistor values* is too small to be entered into parameter
10.30
. The range of parameter
10.30
is 0.0 to 400.0 in
100ms steps.
The following ON times will increase the resistor element up to a temperature of 400°C. The following ‘duty cycles’ keep the
resistor case temperature below the thermostat trip temperature of 160°C. If the following times and duty cycle are exceeded,
the resistor thermostat will open.
Adiabatic ratings
These resistors have a low adiabatic rating. The adiabatic rating is the amount of heat the resistor element can withstand in a
single pulse without being damaged.
Maximum ON times
The following table gives the maximum ON times that the resistor can withstand without the element being damaged. The
table also gives the minimum OFF times before the next pulse to ensure that the resistor element does not get damaged and
also that the resistor case temperature does not exceed approx 160°C.
The following ON times will increase the resistor element up to a temperature of 800°C.
If these ON times are exceeded, the resistor will be damaged.
Alternative braking resistors
Alternative braking resistors can be sourced from the following braking resistor manufacturers:
Pentagon Electrical Products Ltd
www.pentagonelectric.co.uk
Cressall Resistors
www.cressall.com
REO
www.reo.co.uk
Resistor
T
ON
@ 390VDC T
OFF
@ 390VDC T
ON
@ 780VDC T
OFF
@ 780VDC
Ω
ms
s
ms
s
15
110
32
28*
32
20
135
29
34*
29
30
199
25
50*
25
40
218
23
54*
23
50
343
23
86*
23
75
249
18
62*
18
100
438
18
109
18
150
479
15
120
15
Resistor
T
ON
@ 390VDC T
OFF
@ 390VDC T
ON
@ 780VDC T
OFF
@ 780VDC
Ω
ms
s
ms
s
15
220
56
55*
56
20
270
51
67*
51
30
398
42
99*
42
40
436
40
109
40
50
686
41
172
41
75
497
31
124
31
100
876
31
219
31
150
959
26
240
26
NOTE
Содержание COMMANDER SE
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Страница 142: ...142 Commander SE Advanced User Guide Issue Number 4 Figure 6 9 Input line reactor 4400 0241 All dimensions in mm...
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