Low Profile Aluminium
Low Profile Aluminium Housed
Housed Power Resistors
Power Resistors
WCCHB / WCDH Series
·
Low profile aluminium casing
WCCHB / WCDH Series
·
Up to 1.8kW rating on heatsink
·
Up to
profile aluminium casing
heatsink
•
Low
900W rating without
·
Excellent pulse load
heatsink
•
Up to 1.8kW rating on
performance
•
Up to 900W rating
braking in 2
·
Ideal for dynamic
without heatsink
- 30kW drives
•
Excellent pulse
voltage of 3.5kV
·
High isolation
load performance
•
Ideal for dynamic braking in 2
·
RoHS
isolation voltage of 3.5kV- 30kW
construction
compliant, non-flammable
drives
•
High
•
RoHS compliant, non-flammable construction
Electrical Data
WCDH600 WCCHB110 WCDH900 WCCHB166 WCDH1300 WCCHB216 WCCHB270 WCCHB320
Power rating (on
≤0.5°C/W
heatsink)
Power rating (in free air)
Overload rating (5s, non-repetitive)
Resistance range
TCR
Resistance tolerance
Dielectric withstand (50Hz AC, 60s)
Insulation resistance (1kV)
Ambient temperature range
watts
watts
watts
ohms
ppm/°C
%
kV rms
ohms
°C
600
250
5,000
650
300
4,000
900
400
8,000
950
480
5,500
1300
550
10,000
1400
600
8,000
2R2 - 200R
3R3 - 250R
3R3 - 300R
1600
770
10,000
4R7 -
390R
1800
900
12,000
5R1 -
470R
100
5, 10
3.5
>1G
-40 to +90
Physical Data
Dimensions in mm, weight in g
L
±1
WCDH600
WCCHB110
WCDH900
WCCHB166
WCDH1300
WCCHB216
WCCHB270
WCCHB320
P
±1
H
nom
W
nom
A
nom
B
nom
C
nom
ΦD
nom
Section types
1
2
Section
type
Wt.
nom
H
C
B
A
W
102
110
145
166
195
216
270
320
81
98
124
154
174
204
258
2x
154
12.5
15
12.5
15
12.5
15
15
15
68
76
68
76
68
76
76
76
57
60
57
60
57
60
60
60
45
53
45
53
45
53
53
53
9
10.5
9
10.5
9
10.5
10.5
10.5
5.5
4.8
5.5
4.8
5.5
4.8
4.8
4.8
2
1
2
1
2
1
1
1
195
220
270
350
365
480
620
790
ΦD
Construction
A wirewound element on an insulating support is held in the aluminium profile in a symmetrical manner to allow for
thermal expansion during high loads. An optional internal thermostat is fitted. The housing is then filled with quartz
sand, MgO or Al
2
O
3
to spread the heat effectively and minimise surface temperature rise. The termination wires are
300mm long style 1659 PTFE cables, AWG18/16/14 in natural colour. Standard protection is IP45; IP56 is optional.
General Note
Welwyn Components reserves the right to make changes in product specification without notice or liability.
General Note
is subject to Welwyn’s own test data and is considered accurate at time of print.
All information
TT electronics reserves the right to
Limited
Welwyn
Components
make changes in product specification without notice or liability.
All information is subject
Park,
electronics’ own data and is considered accurate at time of going
01670 822181 Fax: 01670 829465 Web: www.welwyn-tt.com
Welwyn Electronics
to TT
Bedlington, Northumberland, NE22 7AA, England. Tel:
to print.
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
© TT electronics plc
09. 11
Low Profile Aluminium Housed
Power Resistors
Low Profile Aluminium Housed Power Resistors
WCCHB / WCDH Series
WCCHB / WCDH Series
Thermal and Overload Data
Temperature Derating
120%
P roportion of P ow er R ating
Surface Temperature Rise
500
Tem pe ra ture R ise (°C )
100%
80%
60%
40%
20%
0%
-40
-20
0
20
40
60
80
100
Ambient temperature (°C)
400
300
200
100
0
0%
50%
100%
150%
Proportion of Rated Power
Repetitive Overload (120s cycle, heatsink mounted)
14
12
10
P o w e r (k W )
1800
1600
1400
8
6
4
2
0
1.0
1300
950
900
650
600
10.0
Duration (s)
100.0
General Note
Welwyn Components reserves the right to make changes in product specification without notice or liability.
All information is subject to Welwyn’s own test data and is considered accurate at time of print.
General Note
TT electronics reserves the right to make changes in product specification without notice or liability.
Welwyn
Components Limited
All information is subject
Park,
electronics’ own data and is considered accurate at time of going to print.
822181 Fax: 01670 829465 Web: www.welwyn-tt.com
Welwyn Electronics
to TT
Bedlington, Northumberland, NE22 7AA, England. Tel: 01670
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
© TT electronics plc
09. 11
Low Profile Aluminium Housed
Low
Resistors
Power
Profile Aluminium Housed Power Resistors
WCCHB / WCDH Series
WCCHB / WCDH Series
Ordering Procedure
Example: WCDH900 with IP45 protection and a 160°C thermostat at 100 ohms and 5% tolerance:
WCDH900A160–100RJB
Type
Protection degree
A
B
IP45
IP56
Standard
Thermostat option
NT
Temperature (°C)
No Thermostat
160 standard
Value (use IEC62 code)
Tolerance (use IEC62 code)
J
5%
K
10%
Packing
B
Bulk Pack
All sizes
Box
Standard
General Note
Welwyn Components reserves the right to make changes in product specification without notice or liability
All information is subject to Welwyn’s own test data and is considered accurate at time of print.
01/10
Welwyn
Components Limited
Welwyn Electronics Park, Bedlington, Northumberland, NE22 7AA, England. Tel: 01670 822181 Fax: 01670 829465 Web: www.welwyn-tt.com
General Note
TT electronics reserves the right to make changes in product specification without notice or liability.
All information is subject to TT electronics’ own data and is considered accurate at time of going to print.
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
© TT electronics plc
09. 11
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