K540-4PS meter
K540-4PS three-phase meter
The purpose of the "K540-4PS" set is to perform electromagnetic tests of transformers of all circuits and connection groups.
The set consists of 2 devices K540-4P and K540-4S meters that can be used both jointly and separately, in accordance with their functional purpose.
K540-4P Power transformer parameter meter performs the following functions -
1) Measurement of current and no-load losses at low and nominal excitation voltages of transformers (automatic switching excitation circuits for measuring no-load losses at low excitation voltage only available for transformers zero and eleventh groups of winding connections. For other groups connection of the windings, these measurements must be carried out with switching of transformer windings);
2) Measurement of current and losses of short-circuit;
3) Measurement of the transformation ratio;
4) Determination of the group of connection of windings for three-phase and single-phase transformers;
4) Measurement of DC resistance of transformer windings to current.
During the measurement, the asymmetry, the unsinusoidality and the excitation voltage frequency are controlled.
K 540-4S Meter of windings resistance of power transformers is intended to measure active electrical resistance to direct current of windings of power transformers in laboratory and field conditions.
Technical specification
Output parameters of the internal voltage source
1. Transformation ratio measurement mode and determination of the connection group in three-phase mode
1a. Output voltage adjustment range - 0-30V
1b The highest value of the output current - 1.0A
1c The difference between the highest and the lowest line voltages - 0.5% max
2 Mode of measurement of no-load losses at low voltage
2a Output voltage adjustment range - 0-380V
2b Maximum value of the output curren 0.3A
Parameters of a three-phase voltage and current meter at rated excitation voltage
1 Range of measurement of AC current - 0.01-10.0 A
2 Limit of the permissible absolute basic error in measuring alternating current - 0.002 x Ix + 1 dig. max A
3 AC voltage measurement range:
3a phase alternating voltage - 1-400 V
3b linear alternating voltage - 1-600 V
4 Limit of permissible absolute basic error in measuring alternating voltage, not more, V 0.002 · Ux + 1 dig.
5 Measurement range of active power, without using a current and / or voltage transformer - 0.1-4000 W
6 Limit of the basic absolute error of active power measurements, W 0.005 · Ux · Ix + 1 dig.
Voltage and current meter parameters at low excitation voltage from an internal source
1. Range of measurement of AC current - 0.01-0.3 A
2. Limit of the permissible absolute basic error in measuring alternating current, no more, A 0.002 ∙ Ix + 1 dig.
3. AC voltage measurement range:
3a. phase alternating voltage - 1-400 V
3b. linear alternating voltage - 1-600 V
4 Limit of permissible absolute basic error in measuring alternating voltage, no more, V 0.002 · Ux + 1 dig.
5 Range of measurements of active power, 0.1-100 W
6 Limit of the basic absolute error of active power measurements, W 0.005 · Ux · Ix + 1 dig.
Parameters of the voltage and current meter at low excitation voltage from an external source
1. Range of measurement of AC current, A from 0.01 to 2
2. The limit of the permissible absolute basic error in measuring alternating current, A, no more than 0.002 ∙ Ix + 1 dig.
3. AC voltage measurement range:
3a. phase alternating voltage, V from 1 to 400
3b. linear alternating voltage, V from 1 to 600
4 Limit of permissible absolute basic error in measuring alternating voltage, no more, V 0.002 · Ux + 1 dig.
5 Range of measurements of active power, W from 0.1 to 700
6 Limit of the basic absolute error of active power measurements, W 0.005 · Ux · Ix + 1 dig.
Parameters of a three-phase voltage meter when determining the transformation ratio and connection group
1. AC voltage measurement range:
1a. phase alternating voltage, V from 1 to 400
1b. linear alternating voltage, V from 1 to 600
2. Limit of permissible absolute basic error in measuring alternating voltage, no more, V 0.002 · Ux + 1 unit
3. Input resistance, not less, kOhm 600
4. Range of measuring AC voltage from an internal source:
4a. phase alternating voltage, V from 1 to 30
4b. linear alternating voltage, V from 1 to 30
5. Limit of permissible absolute basic error in measuring alternating voltage, no more, V 0.002 · Ux + 1 unit
Notes:
IX is the measured value of the current strength, A;
UX - measured voltage value, V;
e.m.r. - unit of the least significant digit.
Basic technical data of the K540-4S meter
1 Range of resistance measurement, From 0.0010 to 2000 Ohm
2 Maximum voltage value, V 48 ± 2
3 Limit of permissible absolute basic error of resistance measurement, Ohm no more than 0.002 · Rx + 1 dig.
4 Maximum current through the winding, A 1.0 ± 0.1
Related products:
