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Medium strength: The device communication loop and the 24V weak electric input and output
terminal grounded can withstand the AC voltage of 50Hz and 500V (effective value).The test
lasts for 1min without breakdown or flashover phenomenon; some of the charged conductive
circuits are grounded separately (between the outer casing and the exposed non-charged
metal parts), between the AC and the DC loop,between the AC current loop and the AC
voltage loop, can withstand AC voltage of 50Hz,2kV (effective value),and the test lasts for
1min without breakdown or flashover phenomenon.
Impulse voltage: the device communication loop and 24V weak electric input and output
terminal grounded can withstand 1kV (peak) standard lightning wave impact test; its charged
conductive terminals are respectively grounded, between AC and DC loop, between the AC
voltage loop and AC current loop, it can withstand the 5kV (peak) standard lightning wave
impact test.
2.6 Mechanical properties
Vibration response
:
IEC255-21-1:1998
,
level 1
Vibration durability
:
IEC255-21-1:1998,level 1
Impact response
:
IEC 255-21-2, level 1
Impact durability
:
IEC 255-21-2, level 1
Collision
:
IEC 255-21-2
,
level 1
2.7 Measurement accuracy
Analog value measurement error ≤±0.2
%
Power measurement error
≤
0
.
5
%
Digital input voltage 220V resolution is no more than 2ms
Pulse input voltage 24V pulse width is not less than 10ms
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