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54
MR medium rating busbar
– five conductor (aluminium)
technical data
Mean room temperature (°C)
15
20
25
30
35
40
45
50
55
60
K1 factor
1·15
1·12
1·08
1·05
1·025
1
0·975
0·95
0·93
0·89
Temperature rating schedule
Multiplier coefficient of nominal rating for room temperature values different from 40°C
Suitable for the following climates :
Constant humid climate (DIN IEC 68 and 2 – 3)
Cyclical humid climate (DIN IEC 68 and 2 – 30)
Complies to :
IEC 439-1 and 2, BS EN 60439 part 1 and 2,
DIN VDE 0660 part 500 and 502
1 : Values for 0·1 s
Rated current
Operational voltage
Insulation voltage
Frequency
Rated shortcircuit current withstand for 3-phase fault (1 s)
Specific Energy withstand for 3-phase fault
Peak current
Rated short-time current for single-phase fault Ph-N(1 s)
Peak current for single-phase fault Ph-N
Rated short-time current single-phase fault Ph-PE (1 s)
Peak current single-phase fault Ph-PE
Phase resistance at 20°C
Phase resistance at thermal conditions (I
n
; 40°C)
Phase reactance (50 Hz)
Neutral resistance at 20°C
Neutral reactance (50 Hz)
Resistance of the protective bar
Reactance of the protective bar (50 Hz)
Resistance of the phase-Pe fault loop
Reactance of the phase-Pe fault loop (50 Hz)
Resistance of the phase-neutral fault loop
Reactance of the phase-neutral fault loop (50 Hz)
Voltage “k” drop coeff. with
distribuited load (k)
Losses for the Joule effect at nominal current
Fire load
Weight
Overall dimensions of the busbar
Degree of protection (CEI EN60529)
IK code CEI EN60068-2-62
In (A)
Ue (V)
Ui (V)
ƒ (Hz)
I
cw
(kA)
rms
I
2
† (M A
2
s)
I
pk
(kA)
I
cw
(kA)
rms
I
pk
(kA)
I
cw
(kA)
rms
I
pk
(kA)
R
2
0 (m
Ω
/m)
R
†
(m
Ω
/m)
X (m
Ω
/m)
Rn
20
(m
Ω
/m)
Xn (m
Ω
/m)
R
PE
(m
Ω
/m)
X
PE
(m
Ω
/m)
R
Ph-Pe fault loop
(m
Ω
/m)
XR
Ph-Pe fault loop
(m
Ω
/m)
R
Ph-N fault loop
(m
Ω
/m)
XR
Ph-N fault loop
(m
Ω
/m)
∆
v (V/m/A)10
-6
cos
ϕ
= 0·70
∆
v (V/m/A)10
-6
cos
ϕ
= 0·75
∆
v (V/m/A)10
-6
cos
ϕ
= 0·80
∆
v (V/m/A)10
-6
cos
ϕ
= 0·85
∆
v (V/m/A)10
-6
cos
ϕ
= 0·90
∆
v (V/m/A)10
-6
cos
ϕ
= 0·95
∆
v (V/m/A)10
-6
cos
ϕ
= 0·00
P (W/m)
(kWh/m)
p (kg/m)
L x H (mm)
IP
IK
160
250
315
400
500
630
800
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
50/60
50/60
50/60
50/60
50/60
50/60
50/60
50/60
15
1
25
1
25
1
25
30
36
36
36
23
63
63
625
900
1296
1296
1296
30
53
53
53
63
76
76
76
9
1
15
1
15
1
15
18
22
22
22
15
30
30
30
36
45
45
45
9
1
15
1
15
1
15
18
22
22
22
15
30
30
30
36
45
45
45
0·492
0·328
0·197
0·120
0·077
0·060
0·052
0·039
0·665
0·443
0·266
0·163
0·104
0·081
0·070
0·053
0·260
0·202
0·186
0·130
0·110
0·097
0·096
0·093
0·492
0·328
0·197
0·120
0·077
0·060
0·052
0·039
0·260
0·202
0·186
0·130
0·110
0·097
0·096
0·093
0·202
0·167
0·125
0·084
0·060
0·050
0·044
0·034
0·119
0·105
0·101
0·075
0·068
0·063
0·063
0·061
0·866
0·611
0·391
0·247
0·164
0·131
0·113
0·087
0·379
0·307
0·287
0·205
0·178
0·160
0·159
0·154
1·157
0·771
0·463
0·283
0·181
0·141
0·121
0·093
0·520
0·404
0·372
0·260
0·220
0·194
0·192
0·186
564
394
276
179
131
109
102
90
581
404
279
180
130
108
100
88
596
412
281
180
129
107
98
85
608
418
281
179
127
104
95
82
616
422
277
176
122
100
91
77
617
419
269
169
115
93
83
69
576
384
230
141
90
70
60
46
51
83
79
78
78
97
134
160
1·3
1·3
1·3
1·8
1·8
1·8
1·8
1·8
7·6
8·0
8·9
11·4
13·5
15·2
16·4
17·9
76 x195
76x195
76x195 136x195 136x195 136x195 136x195 136x195
52-55
52-55
52-55
52-55
52-55
52-55
52-55
52-55
10
10
10
10
10
10
10
10
3L+N 100% +PE 100% (Aluminium)
Voltage “k” drop coeff. with
distributed load (k)