Mitsubishi Electric MELPRO-A Series Instruction Manual page 7

Characteristics
(MGR type relay ＋ MZT type ZCT combination)
Item
Standard use
conditions
Operation value
characteristics
Reset value
characteristics
Operating time
characteristics
Resetting time
characteristics
Overshoot time
characteristics
Variation
characteristics of
auxiliary power
supply voltage
Temperature
characteristics
Vibration
Shock
Insulation
resistance
Withstand voltage
Lightning impulse
withstand voltage
Noise-proof
Radio disturbance
Ambient temperature: –20 to +60℃ (Under the state where dew condensation or freezing does not occur)
Relative humidity: 30 to 80% on daily average
Altitude: 2000m or lower
・The state where abnormal vibration, shock, and inclination are not applied.
・The state where it is not exposed to harmful gas, excessive dust, and water droplet or vapor.
Setting: Operating time = Minimum
Criteria: Within ±10% of each setting value
90% or more of operating value
Input: I = 0 → 130% and 400% of setting value
0
Time setting
Instantaneous
0.2s
0.3s or more
Input: I = 130% and 400% of setting value → 0
0
Criteria: Less than 500ms
Setting: Zero-sequence current I
Input: I = 400% of setting value
0
Applied time: 0.05s
Criteria: The relay shall not operate.
Input: Auxiliary power supply = AC90V～AC120V
Criteria: Within ±10% of I
Ambient temperature: -20, +60℃
Criteria:
Operation value of I : Within ±20% of operation value at 20℃
0
Operating time: Within ±20% of operating time at 20℃
Peak-to-peak amplitude mm
(Acceleration m/s
Frequency
(Hz) Forward/
backward
10 5 (10)
16.7
Maximum acceleration: 300m/s
Direction: 3 directions in forward/backward, right/left, and up/down
Criteria: No abnormality when applying two shocks in each direction
Test circuit: Between all circuits and earth (E terminal), between separate circuits, and between the
poles of contacts
Criteria: More than 10MΩ by DC500V megger.
(Note) The test is held under the condition that relative humidity is less than 80%.
Between all circuits and earth (E terminal): AC2000V, for 1 minute
Between separate circuits: AC2000V, for 1 minute
Between the poles of contacts: AC1000V for 1 minute
Apply standard waveform (1.2/50 μs) to positive/negative pole for 3 times respectively.
Between ZCT primary and earth: 60kV
Between all circuits of the relay and earth (E terminal): 4.5kV
Between ZCT secondary and control circuit: 4.5kV
Between contact terminal and power supply terminal: 3.0kV
Between terminals of power supply: 3.0kV
Apply damped oscillatory wave prescribed in JIS C 4601 for 2 seconds.
・Between ZCT secondary and earth (E terminal)
・Between power supply terminal and earth (E terminal)
・Between terminals of power supply
・Between contact terminal and earth (E terminal)
Setting: Minimum operation value and minimum operating time
Input: Rated auxiliary power supply, I
Criteria: No malfunction
Intermittently irradiate radio waves to the front panel of the relay with a transceiver of 150MHz or
400MHz band (5W output) from a distance of 0.5m.
Setting: Minimum operation value and minimum operating time
Input: Rated auxiliary power supply, I
Criteria: No malfunction
Characteristics
Current Ratio to the setting current
130%
0.1～0.3s
±20% of setting time
= 0.2A, Operating time = 0.2s
0
operation value at rated voltage
0
2
)
Right/left Up/down
2.5 (5)
0.4 (2)
2
= 0
0
= 0
0
7
400%
75ms or less
0.1～0.2s
±10% of setting time
Setting: Minimum operation value and
Vibration
minimum operating time
time
Input: Rated auxiliary power supply
(s)
I = 0
0
Criteria: No
30
abnormal indication
600
malfunction and no
JEP0-IL9555