P341/EN AD/F43 Update Documentation
(AD) -8
MiCOM P341
Output Contacts
Standard Contacts
General purpose relay outputs for signaling,
tripping and alarming:
Rated voltage: 300 V
Continuous current: 10 A
Short-duration current: 30 A for 3 s
Making capacity: 250A for 30 ms
Breaking capacity:
DC: 50W resistive
DC: 62.5W inductive (L/R = 50ms)
AC: 2500VA resistive (cos = unity)
AC: 2500VA inductive (cos = 0.7)
AC: 1250VA inductive (cos = 0.5)
Subject to maxima of 10A and 300V
Response to command: < 5ms
Durability:
Loaded contact: 10 000 operations
minimum,
Unloaded contact: 100 000 operations
minimum.
High Break Contacts
Relay outputs for tripping:
Rated voltage: 300 V
Continuous current: 10 A dc
Short-duration current: 30 A dc for 3 s
Making capacity: 250A dc for 30 ms
Breaking capacity:
DC: 7500W resistive
DC: 2500W inductive (L/R = 50ms)
Subject to maxima of 10A and 300V
Response to command: < 0.2ms
Durability:
Loaded contact: 10 000 operations
minimum,
Unloaded contact: 100 000 operations
minimum.
Watchdog Contacts
Non-programmable contacts for relay
healthy/relay fail indication:
Breaking capacity:
DC: 30W resistive
DC: 15W inductive (L/R = 40ms)
AC: 375VA inductive (cos = 0.7)
IRIG-B Interface (Modulated)
External clock synchronization per IRIG
standard 200-98, format B12x
Input impedance 6k at 1000Hz
Modulation ratio: 3:1 to 6:1
Input signal, peak-peak: 200mV to 20V
IRIG-B 00X Interface (De-modulated)
External clock synchronization per IRIG
standard 200-98, format B00X.
Input signal TTL level
Input impedance at dc 10k
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
Type Tests
Insulation
Per IEC 60255-5: 2000:
Insulation resistance > 100M at 500Vdc
(Using only electronic/brushless insulation
tester).
Creepage Distances and Clearances
IEC 60255-27: 2005
Pollution degree 3,
Overvoltage category III,
Impulse test voltage 5 kV.
High Voltage (Dielectric) Withstand
(i) Per IEC 60255-5: 2000, 2 kV rms
AC, 1 minute:
Between all independent circuits.
Between independent circuits and protective
(earth) conductor terminal.
1kV rms AC for 1 minute, across open
watchdog contacts.
1kV rms AC for 1 minute, across open
contacts of changeover output relays.
1kV rms AC for 1 minute for all D-type
EIA(RS)232/EIA(RS)485 ports between
the communications port terminals and
protective (earth) conductor terminal.
(ii) Per ANSI/IEEE C37.90-1989 (reaffirmed
1994):
1.5 kV rms AC for 1 minute, across open
contacts of normally open output relays.
1kV rms AC for 1 minute, across open
watchdog contacts.
1kV rms AC for 1 minute, across open
contacts of changeover output relays.
Impulse Voltage Withstand Test
Per IEC 60255-5: 2000:
Front time: 1.2 µs, Time to half-value: 50 µs,
Peak value: 5 kV, 0.5J
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