P54x/EN TD/La4 Technical Data
(TD) 2-4
MiCOM P543, P544, P545 & P546
TD
Environmental conditions
Ambient temperature range
Per IEC 60255-6: 1988
Operating temperature range:
-25°C to +55°C (or -13°F to +131°F).
Storage and transit:
-25°C to +70°C (or -13°F to +158°F).
Ambient humidity range
Per IEC 60068-2-3: 1969:
56 days at 93% relative humidity and +40°C
Per IEC 60068-2-30: 1980:
Damp heat cyclic, six (12 + 12) hour cycles,
93% RH, +25 to +55°C
Corrosive environments
Per IEC 60068-2-60: 1995, Part 2, Test Ke,
Method (class) 3
Industrial corrosive environment/poor
environmental control, mixed gas flow test.
21 days at 75% relative humidity and +30oC
exposure to elevated concentrations of H2S,
NO2, Cl2 and SO2.
Type tests
Insulation
Per IEC 60255-27: 2005
Insulation resistance > 100 M at 500 Vdc
(Using only electronic/brushless insulation
tester).
Creepage distances and clearances
Per IEC 60255-27: 2005,
Pollution degree 3,
Overvoltage category III,
Impulse test voltage 5 kV.
High voltage (dielectric) withstand
EIA(RS)232 ports excepted.
(i) Per IEC 60255-27: 2005, 2 kV rms
AC, 1 minute:
Between all case terminals connected
together, and the case earth.
Also, between all terminals of independent
circuits.
1 kV rms AC for 1 minute, across open
watchdog contacts.
1 kV rms AC for 1 minute, across open
contacts of changeover output relays.
(ii) Per ANSI/IEEE C37.90-1989 (reaffirmed
1994):
1.5 kV rms AC for 1 minute, across open
contacts of changeover output relays.
Impulse voltage withstand test
Per IEC 60255-27: 2005
Front time: 1.2 µs, Time to half-value: 50 µs,
Peak value: 5 kV, 0.5J
Between all terminals, and all terminals and
case earth.
Electromagnetic compatibility (EMC)
1 MHz burst high frequency disturbance
test
Per IEC 60255-22-1: 1988, Class III,
Common-mode test voltage: 2.5 kV,
Differential test voltage: 1.0 kV,
Test duration: 2 s, Source impedance: 200 Ω
EIA(RS)232 ports excepted.
100kHz damped oscillatory test
Per EN61000-4-18: 2006 Level 3
2.5 kV peak between independent circuits and
case earth.
1.0 kV peak across terminal of the same
circuit.
Immunity to electrostatic discharge
Per IEC 60255-22-2: 1996, Class 4,
15 kV discharge in air to user interface,
display, and exposed metalwork.
Per IEC 60255-22-2: 1996, Class 3,
8 kV discharge in air to all communication
ports.
6 kV point contact discharge to any part of the
front of the product.
Electrical fast transient or burst
requirements
Per IEC 60255-22-4: 2002. Test severity
Class III and IV:
Amplitude: 2 kV, burst frequency 5 kHz
(Class III),
Amplitude: 4 kV, burst frequency 2.5 kHz
(Class IV).
Applied directly to auxiliary supply, and
applied to all other inputs. EIA(RS)232
ports excepted.
Surge withstand capability
IEEE/ANSI C37.90.1: 2002:
4 kV fast transient and 2.5kV oscillatory
applied common mode and differential mode to
opto inputs (filtered), output relays, CTs, VTs,
power supply, field voltage.
4 kV fast transient and 2.5 kV oscillatory
applied common mode to communications,
IRIG-B.
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