14
4.4.1 Overloads
n
Limit measuring time above 1000 A.
Intensity
I < 1000 A~
1000 A~ < I < 1200 A~
Operation
Permanent
(1)
15 minutes on, followed by 30 minutes off.
1)
With a frequency F < 1 kHz except C173
C173 with frequency
≤
≤
≤
≤
≤
500 Hz :
- Permanent up to 800 A
- Permanent up to 1000 A if temperature
≤
40°C
- 15 min. on, followed by 30 min. off for 1000 A < I < 1200 A
4.4.2 Frequency
n
C100 / C102 / C103 / C106 / C107 / C112 / C113 / C116 / C117 / C122 :
- Use : 30 Hz to 5 kHz
- Current limitation beyond 1 kHz as per following formula :
I permanent =
1000 A
f (in kHz)
n
C148 :
- Use : 48 Hz to 1 kHz
n
C160 :
- Use : 10 Hz to 100 kHz (-3 dB from 50 kHz to 100 kHz)
- Current limitation beyond 1 kHz as per following formula :
I permanent =
1000 A
f (in kHz)
n
C173 :
- Use : 10 Hz to 1 kHz for 1000 A calibre
10 Hz to 3 kHz for other calibres
- Current limitation beyond 500 Hz as per following formula :
I permanent =
1000 A
2 x f (in kHz)
4.4.3 Environmental conditions
n
Indoor use
n
Altitude
: < 2000 m
n
Climatic conditions : -10 to +55° C and RH < 85%
n
Avoid splashing with water
4.5
Dimensions and weight
n
Overall dimensions
: 216 x 111 x 45 mm
n
Weight
: approx. 550 g
n
Jaw opening
: 53 mm
n
Open jaw height
: 139 mm
n
Max. clamping capacity : Ø 52 mm cable or 1 5x5 mm bar or 4 30x5 mm bars
4.6
Compliance with international norms
4.6.1 Electrical safety (as per EN 61010-1 and EN 61010-2-032)
n
Dual insulation
n
Pollution level 2
n
600 V Category III
