Portable appliance cable PKP-5 (PKP 5, PKP5)
Insulation resistance, G W: up to 10 (up to 50).
The ratio of the bridge arms and the DC method Varley (multiplier n): n = 0,001 / 0,01 / 0,1 / 1/10.
Portable appliance cable PKP-5 allows you to measure:
electrical loop resistance (R SHL);
the difference in electrical resistance - resistance asymmetry (Ra), electrical insulation resistance, including in noisy environments (Riso), capacitance (C), the ratio Rx / Rl, where Rx-impedance to the fault;
Rl - resistance of a good conductor, the ratio of Cl / Cl
where C - the capacity of the wire - the "earth" damaged wires, Cl - capacity-wire "ground" wire serviceable
Portable appliance cable PKP-5 designed for use in stationary and field conditions with climatic influences (ambient temperature, ° C from -30 to +50, relative humidity 90% at +30 ° C (atmospheric pressure, kPa (mm . Hg) - 106.7 ... 60 (460 ... 800)
Power supply unit.
Power supply unit PKP-5 is one of the following sources: AC voltages (220 +22 / -33) V, (36 +3.6 / -5.4) V (24 +2.4 / -3 6) (50 ± 2) Hz;
built-in dry battery type A343 TU16-529.271-73 - 12-elements, an external battery voltage of 12 to 18V. Power consumption AC should not be more than 6 VA, maximum strength of an electric current drawn from the DC source voltage 15V, 150mA max.
Time of the instrument PKP-5 from the built-in battery of a freshly made items is not less than 50 hours in a cycle of 4 hours a day. Note: Items with the instrument are not included. The size and weight of the device. Unit dimensions 453x330x238 mm, weight with built-in battery and power cord no more than 12,5 kg. The ranges and limits of permissible error of measurement. Measuring range R SHL 10 -1 -10 5
Limit of acceptable relative error ± (0,2 + R I / Rizm)%, where R I = - the 1st, Rizm - measured resistance in ohms. Limit of acceptable relative error in the operating conditions and applications.
Note. Maximum permissible error of PKP-5 in the working conditions of use shall be determined separately for each influence quantity (temperature, humidity).
R a measuring range -1 ... 10 February 10 ohms for R SHL from 10 to 5000 ohms. Limit of acceptable basic error referred to a half of an electrical loop resistance ± (0,2 + R2 / R SHL)%. Limit of acceptable reduced error in the working conditions of use ± (0,5 + R2 / R SHL)%, where R2 = 20 ohms.
Measurement range with no interference Riso May 10 -2 × 10 10 ohm, under impulse noise May 10 -10 10 ohms.
For the scheme, operating in the absence of interference, the limit of acceptable basic error of the length of the working part of the scale ± 2,5%.
Limit of acceptable reduced error PKP-5 in the working conditions of application of the length of the working part of the scale of ± 3,5%.
For the scheme, operating in a frequency transients (1-5) Hz voltage up to 5V, the limit of acceptable basic error of the length of the working part of the scale ± [2,5 + (lmeas / L I) · (Rdop / Rizm)] %. Limit of acceptable reduced error in the working conditions of application of the length of the working part of the scale ± [3,5 + (lmeas / L I) · (Rdop / Rizm) · 100]%
where L I - part length scale mm;
Lmeas - the length of the scale of the plot mark of 10 to a point corresponding to the measured resistance Rizm.
Rdop - the pressure in the measuring circuit Riso;
Capacitance measuring range 3-3000nF. Limit of acceptable basic error PKP-5 of the full scale ± 2,5% at Rins ≥ July 10 ohms;
limit of acceptable reduced error in the working conditions of application of ± 3,5%.
The range of measurement of the ratio Rx / R l 0,01-1 at 10 ≤ R ≤ SHL 5000 ohms. Limit of acceptable basic error
1) K ≥ 400 and measurement methods bridge variable and constant ratio of shoulders:
± 0,5% at R T ≤ 10 6 ohms;
± 1,0% at R T ≤ July 10 ohms;
limit of acceptable reduced error in the working conditions of application of ± 0,75% at R T = 10 6 ohms;
± 1,5% with R = n July 10 ohms;
2) 1,3 ≤ ≤ 3 K & P ≤ R ≤ 10 5 ohms when measured by the compensation method (method of branched currents), the limit of acceptable basic reduced error of ± 0,5%.
Limit of acceptable reduced error PKP-5 in the working conditions of application of ± 0,75%.
When Rx ≤ 10 Ohm to the value of the error must be added δdop = R3/Rx · 100%
And where K - the ratio of resistances damaged and serviceable (conditionally serviceable) wires;
R P - value of the insulation resistance of the transition at the injury site; rg = 0.01 ohms; Rx - the resistance to fault, Om.
The range of measuring the ratio of capacitances Cx / C l 0,01-1 at 10 ≤ Cx ≤ 1000nF.
Limit of acceptable basic error (R P ≥ 10 August) ± 0,6%. Limit of acceptable reduced error PKP-5 in the working conditions of application of 0.9%.