Two technical parameter
2.1 Rated parameters
2.1.1Rated DC voltage： 220V or 110V (order indicated)
2.1.2 Rated AC data：
a) Phase voltage V
2.3.2 medium strengthUnder normal test conditions, the device can withstand the frequency of 50Hz, voltage 2000V lasted 1 minutes of power frequency voltage withstand test without breakdown flashover and component damage. During the test, the other circuit is connected to the ground with the other circuit when the voltage is applied.
2.3.3 impulse voltageIn the normal test atmospheric conditions, device power input circuit, the AC input circuit, output contact circuit and loop between, can withstand the 50s of the standard lightning wave short-time impulse voltage test, open test voltage 5kV.
2.3.4 resistance to damp heat resistance
The device can withstand the damp heat test specified in the twenty-first chapter of the GB7261. The highest temperature test + 40 DEG C, maximum relative humidity of 95%, the test time for 48 hours, each cycle lasted 24 hours of cyclic damp heat test, at the end of the test within 2 hours before according to the requirement 2.3.1, measure the circuits between the conductive circuit foreign Lufei charged metal part and the shell, electrical contact between the insulation resistance is not less than 1.5m ohm, medium compressive strength of not less than 75% of the 2.3.2 provisions of the dielectric strength test voltage amplitude.
2.5 mechanical properties
2.5.1 vibration
The device can withstand the vibration endurance test of the I level of 16.3 in the GB7261.
2.5.2 impact
The device can withstand the impact endurance test of the I level of 17.5 in the GB7261.
2.5.3 collision
The device can withstand the impact endurance test of the GB7261 level of I in the eighteenth chapter.
2.6 environmental conditions
A) ambient temperature: Work: -40 C ~ 85.
Storage: 25 degrees to +70 degrees Celsius, in the limit value does not apply the amount of incentive, the device does not appear irreversible change
After the temperature is restored, the device should be able to work properly.
Relative humidity: the maximum monthly average relative humidity of 90%, while the average monthly average of.
The lowest temperature is 25 DEG C and no condensation surface. When the maximum temperature of +40 degrees Celsius, the average maximum relative humidity
Degree no more than 50%.
(c) atmospheric pressure: 86 to 106kPa (relative altitude below 2km)

2.2 Main technical performance
Precise working range of 2.2.1 sampling circuit (10% error)
Voltage: 0.4 V ~ 120V
Current: 0.08In20In
2.2.2 contact capacity
Signal circuit contact current carrying capacity 400VA
Signal circuit contact fault arc capacity 60VA
2.2.3 tripping current
Breaker trip current 0.**~4A (order indication)
The circuit breaker closing current 0.**~4A (the order stated)
2.2.4 precision of various components
Current component: <5%
Voltage components: <5%
Time element: 0s-1s, the error is not more than 40ms;
1s above, the error is not more than < + 2.5%;
Frequency deviation: <0.02Hz

device overview
SAI3880D series digital generator protection device with high performance chip supports universal hardware platform, easy to maintain; the Ethernet communication, high-speed data transmission and reliable. Complete localization of Chinese display technology, simple operation.
Based on waterproof, dust, anti vibration design, can be run in a variety of field conditions.
Suitable for capacity of 50MW and below the fire and hydro generator protection.
1.2 main features of the device
An Motorola 32 bit microcontroller technology, the stability and speed of products is guaranteed
The protection. The 14 bit a / D converter, optional measurement module dedicated to the A / D conversion accuracy is up to 24 bits and the measurement indicators easily reach
The purpose of configuration with high capacity RAM and Flash Memory, can record 8 to 50 recorded reports, record the number of events is not less than 1000
An independent tuning of 32 sets of protection setting value, safe and convenient switch
In high precision clock chip, and equipped with GPS hardware circuit for the whole time, system clock synchronization
It is equipped with high speed Ethernet communication interface, and the integration of IEC870-5-103 standard communication protocol
In the electrical design with the machine, no adjustable device
In high grade, quality assurance component selection
An excellent anti-interference performance, panel or installed in the switch cabinet without other anti-jamming module
The purpose of self diagnosis function perfect
The chassis design of waterproof and dustproof and anti vibration.
The purpose of debugging conceptual design

1)under the time limit: when the three-phase current is greater than the lower limit of the value of any phase, but not meet the anti time limit start value, press the lower limit delay action on the alarm **;
2) inverse time: when the three-phase current any phase current is larger than the inverse time starting value, according to the inverse time lag action equation I2-1 t is greater than or equal to K acts, type: I for the generator current standard? Value, K - generator stator winding allows thermal time constant.
3) the upper bound limit: when the three-phase current is greater than the upper limit value, the time limit is delayed by the time limit.
3.8 transverse differential protection
Generator transverse differential protection is usually used for the reaction of generator stator winding inter turn short circuit and a parallel windings open welding, protection from the generator neutral point between two branch imbalance fundamental current, but current is greater than fixed value setting delay action on the alarm or trip.

-/gjigcb/-

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