Schneider Electric ALTIVAR 58 TRX - Manual (Page 37)

Altivar ® 58 TRX AC Drives
Dynamic Braking Resistor Kits
37
09/2003 © 2000–2003 Schneider Electric All Rights Reserved
Current/Time Characteristics for DB Resistor Assemblies
The figure below shows the allowable GV2 trip times as a function of current setting multiples with the
dynamic braking resistor assembly located in a 40 °C (104 °F) ambient temperature environment. See
page 35 for an example of how to calculate resistor size.
The kits in the following table use the thermal protection of a GV2 manual starter and have a Type 1
rating per UL 50. The insulation system is suitable for use in a Pollution Degree 3 environment (refer to
NEMA ICS-1 Annex A). The package is UL/CSA marked.
DB Kits Technical Specifications
Dynamic Braking Kit for:
Ohmic Value
(Rdb) Continuous Current Rating
of Assembly
◆
(Ir)
Average Power
(W)
Catalog Number
ATV58•U09M2 ▼ , ATV58•U18M2 ▼ ,
ATV58•U18N4, ATV58•U29N4,
ATV58•U41N4, ATV58•U54N4,
ATV58•U72N4
120 Ω 1.0 A 120 VW3A66711
ATV58•U29M2, ATV58•U41M2,
ATV58•U90N4, ATV58•D12N4
56 Ω 1.45 A 118 VW3A66712
ATV58•U54M2, ATV58•U72M2,
ATV58•D16N4, ATV58•D23N4
28 Ω 2.7 A 204 VW3A66713
ATV58•U90M2, ATV58•D12M2,
ATV58•D28N4, ATV58•D33N4,
ATV58•D46N4
14 Ω 3.8 A 202 VW3A66714
ATV58•D16M2, ATV58•D23M2,
ATV58•D54N4
10 Ω 10.0 A 1000 VW3A66715
ATV58•D28M2, ATV58•D33M2,
ATV58•D46M2, ATV58•D64N4,
ATV58•D79N4
5 Ω 14.0 A 980 VW3A66716
◆ Current rating of resistor assembly is calculated based on setting of internal overload protective device in assembly, overload setting based on
enclosure overtemperature protection, and resistor overload versus time characteristics. Resistors are rated for stopping six times rotor inertia of four-
pole motor with drive at current limit. Motor inertias are based on NEMA MG-1 14.45.
▼ Requires external braking transistor, VW3A58701.
Time (s)
10000
1000
100
10
1
0.1
0.01
0.001
1 1.5 10 100
Multiples of current setting (lr)
Cold State
Hot State
DynBr
kCur
v e s .eps