Specifications; Ambient Conditions; General Electrical Specifications - Danfoss VLT Brake Resistor MCE 101 Design Manual

Specifications

9 Specifications

9.1 Ambient Conditions

Environment
Ambient temperature range
Temperature range during storage/transport
Maximum temperature at housing
Maximum relative humidity
Power derating as a function of ambient temperature. (100% power rating and pulse-load):
- Steel grid brake resistors, IP20
- Aluminum-housed compact brake resistors, IP21
- Aluminum-housed brake resistors - compact and flat-pack, IP54
- Aluminum compact brake resistors, IP65
Power derating at vertical mounted resistor (wall-mounted) when mounted horizontal (100% power rating and pulse-
load):
- Aluminum-housed flat-pack brake resistors, IP54
- Aluminum-housed compact brake resistors, IP21, IP54, IP65
Cooling requirements:
The brake resistors are cooled by free natural convection. The power ratings of the resistors refers to cooling conditions
with free natural cooling. The requirements for minimum clearances must be observed during installation.
Derating at high altitudes
9 9
Derating at high altitudes
Derating at high altitudes

9.2 General Electrical Specifications

Electrical specifications
Resistance tolerances
Insulation
Dielectric strength
Operating voltage:
- Aluminum-housed compact brake resistors, IP54
- Aluminum-housed compact brake resistors, IP54
- Aluminum-housed flat-pack brake resistors, IP54
- Aluminum-housed flat-pack brake resistors, IP54
- Aluminum-housed compact brake resistors, IP21, IP65
- Aluminum-housed compact brake resistors, IP21, IP65
- Steel grid brake resistors, IP20
Power rating (continuous load 100%) with and without temperature switch
- Without temperature switch
- With temperature switch, steel grid brake resistors, IP20
- With temperature switch, aluminum-housed brake resistors,
IP21, IP54, IP65
- With temperature switch, aluminum-housed brake
resistors, IP21, IP54, IP65
Electrical data temperature switch:
- Steel grid brake resistors, IP20
- Aluminum-housed brake resistors, IP21, IP54, IP65
66
Design Guide
Temperature switch enables at ≥80% of the continuous power
Danfoss A/S © Rev. 05/2014 All rights reserved.
5-85%, non-condensation during operation
Continuous power 100% @ 40 °C to 70% @ 70 °C, linear
Continuous power 100% @ 40 °C to 75% @ 70 °C, linear
Continuous power 100% @ 40 °C to 75% @ 70 °C, linear
Continuous power 100% @ 40 °C to 50% @ 70 °C, linear
100% @ 1000 m above sea level
94% @ 1500 m above sea level
82% @ 3000 m above sea level
100% of continuous power rating @ 40 °C
100% of continuous power rating @ 40 °C
Minimum 80% of continuous power rating @ 40 °C
10 A, 250 V AC, normally closed (NC). Enables at 260 °C
2 A, 250 V AC, normally closed (NC). Enables at 180 °C
-40 to 70 °C
-40 to 70 °C
300 °C
No derating
-20%
±10%
> 20 MΩ @ 1000 V
2500 V AC for 1 min.
UL: 600 V AC/600 V DC
IEC: 690 V AC/1100 V DC
UL: 1000 V AC/1400 V DC
IEC: 1000 V AC/1400 V DC
UL: 600 V AC/600 V DC
IEC: 690 V AC/1100 V DC
IEC: 690 V AC/1100 V DC
rating @ 40 °C
MG90O202