RETOM25 is a new system in RETOM product range, which has all the functionality of RETOM21, but is light in weight (19 kg) and compact (340х430х205 mm).
RETOM25 is irreplaceable for test and adjustment of the following primary and secondary equipment:
Main advantages:
Delivery kit of RETOM25 tester includes:
At customer’s request, the following can be included into the delivery kit:
SPE “Dynamics” guarantees high quality and reliability of RETOM25 tester within 5 years from the date of delivery.
Parameter 
Value 

Operation range, to be selected in the menu 
10 
65 
250 

Output voltage control ranges, V 
0 – 10 
0 – 65 
0 – 250 

Output current control ranges, A 
0 – 10 
0 – 1.5 
0 – 0.6 

Max. output signalbased setting resolution, %, max. 
0.2 

Output power, V?A, min. 

 longtime3) 
100 

 during 5 s 
150 

Nonlinear distortion factor, %, max. 
1.0 5) 

Simulated signal frequency ranges4), Hz 
20 – 45 
over 45 – 55 
over 55 – 1000 

Frequency variation resolution, Hz, max. 
0.5 
0.001 
0.5 

Permissible absolute frequency simulation error limits, Hz: 
±0.5 
±0.001 
±0.5 

Voltage and current signal phase angle variation range, ° 
0 – 360 

Phase angle variation resolution, ° 
0.3 

Permissible absolute phase angle simulation error limits, ° 
±1.0 

Output circuit protection against shortcircuit, overload and overheating 
+ 

Output circuit protection against external voltage, V rms, max. With power of 1000 VA max. 
12 
75 
264 

Output time of 10 minutes max., at mains voltage of 230 V min. When signal frequency decreases below 45 Hz and exceeds 200 Hz, output power and output signal level decrease. At max. output power there can be output signal distortions up to 5%. 
Parameter 
Value 

Simulated current and voltage signal frequency (mains frequency), Hz 
45 – 65 

Output circuit protection against shortcircuit, overload and overheating 
+ 

Source 3. “~U3” OUTPUT. Adjustable AC current or voltage 

Parameter 
Value 

Operation range, to be selected in the menu 
"250 V" 
"50 V" 

Current control ranges, A 
0 – 6 
0 – 30 

Voltage control ranges, V 
6 – 250 
1.0 – 50 

Output power, V×A, min.: 

 continuously6) 
1000 

 during 1 minute 
12007) 

 during 10 s 
14007) 
Parameter 
Value 

Operation range, to be selected in the menu 
"U4 Output" 

Item in operation menu for DC of Source 3 
"Rectified" 
"Smoothed" 

Type of current 
rectified 
DC 

Voltage control range, V 
8 – 250 
10 – 350 

Current control range, A 
0 – 3 
0 – 2 

Switching current, A 
2 
0.5 

Voltage ripple excursion of set value, %, at output voltage of 220 V, max.: 

 at current 1 A 
– 
10 

 at current 2 A 
– 
15 

Longtime output power6), W, min. 
750 
700 
Parameter 
Value 

Operation range, to be selected in the menu 
150 А 

Voltage control range, V 
0 – 7.5 

Output power, V×A, min.: 

 continuously6) 
1000 

 during 1 minute 
12007) 

 during 5 s 
14007) 

Output current, A, min.: 

 continuously6) 
130 

 during 1 minute 
1507) 

 during 5 s 
2007) 
Parameter 
Value 

Operation range, to be selected in the menu 
U6 Output 

Output voltage control range6), V 
5 – 215 

Output current, A, min.: 

 continuously6) 
10 

 during 5 s 
207) 

 during 0.5 s 
307) 

Output power, V×A, min.: 

 continuously6) 
2000 

 during 1 minute 
22007) 

 during 5 s 
40007) 

 during 0.5 s 
50007) 
Parameter 
Value 

Resistance, Ohm 
0 
330 

Permissible operation time 
continuously 
min. 1 minute 

Parameters are achieved in continuous mode (max. output time of 10 minutes), at mains voltage of 220 V min. and max. output voltage. At mains voltage of 230 V min. Note – At signal level below 5% there can arise distortions. 
Parameter 
Value 

Type of current 
DC / AC 

Ammeter 

Current measuring unit resolution, A 
0.0001 
0.001 
0.01 
0.1 

Source 1 (I1) DC current measurement limits8), A 
 
2.09) 
 
 

PA Input AC current measurement limits8), A 
0.1 
1.0 
10 
 

Source 2 (I2) AC current measurement limits8), A 
0.2 
2.0 
20 
 

Source 3 (I3) AC current measurement limits8), A 
0.5 
5.0 
50 
 

Source 3 (I4) DC current measurement limits8), A 
0.5 
5.0 
 

Source 3 (I5) AC current measurement limits8), A 
 
 
50 
500 

Min. permissible value of measured parameter, % of measurement limit 
10 

Permissible reduced basic current measurement error limits for “2 A” limit (Source 1), % 
2 

Permissible absolute basic current measurement error limits, A: 

 for 50 A, 500 A limits of U5 output 
± [0.01x+0.001 Xe ] 

 for other limits (apart from 2 A (I1), 50 A, 500 A (I5)) 
± [0.005x+0.0005 Xe] 

Min. current measurement time, ms 
110) 

Limits of permissible complementary current measurement error caused by ambient temperature variation do not exceed 0.5 of basic error limit per every 10 °С 

Limits of permissible complementary current measurement error caused by frequency deviation with respect to rated frequency (50 Hz) do not exceed 0.1 of basic error limit per 10 Hz of deviation 

Voltmeter 

Voltage measurement limits8), V 
6 
600 

Voltage measuring unit resolution, V 
0,001 
0,1 

Min. voltage measurement time, ms 
110) 

Min. permissible value of measured parameter, % of limit 
1 

Input overload capacity, %, of limit 
130 

Permissible absolute basic voltage measurement error limits, V 
± [0.005x+0.0005 Xe] 

Voltmeter input resistance, kOhm, min. 
1000 

Limits of permissible complementary voltage measurement error caused by ambient temperature variation do not exceed 0.5 of basic error limit per every 10 °С 

Limits of permissible complementary voltage measurement error caused by frequency deviation with respect to rated frequency (50 Hz) do not exceed 0.1 of basic error limit per 10 Hz of deviation 

Frequency meter 

Frequency measurement ranges by voltage input, Hz 
20  45 
over 45  55 
over 55 1000 

Frequency measurement resolution, Hz 
0.01 
0.001 
0.1 

Permissible absolute frequency measurement error limits within operating voltage measurement ranges, Hz 
± 0.05 
± 0.005 
± 0.5 

Min. permissible voltage level value during frequency measurement, mV 
600 

Phase meter 

Phase angle between two voltages, voltage and current, two currents measurement range, ° 
0360 

Phase angle measurement resolution, ° 
0.1 

Permissible absolute phase angle between two voltages, voltage and current, two currents measurement error limits within operating current and voltage measurement ranges, ° 
± 1.0 

Min. permissible voltage level value during phase measurement, mV 
600 

Limits of permissible complementary phase angle measurement error caused by ambient temperature variation do not exceed basic error limit per 10 °С 

Note – Phase angle is measured only within mains frequency deviation of 4555 Hz. Measurement is taken only for basic harmonic signals. 

Additionally calculated parameters 

Active power 
P 

Reactive power 
Q 

Apparent power 
S 

Resistance 
Z 

 active component 
R 

 reactive component 
XL/XC 

Loss tangent 
TG 

Power factor (cos φ) 
CОS 

Measurement error of additional rated parameters is combined of errors of basic measured parameters and determined as square root of the sum of squares. 

Upper measurement range limit is given. Measurement limit of corresponding parameter is selected in the menu of the device. On default, automatic switch between measurement ranges – AUTO mode – is set in the menu for each parameter. Ammeter capability to display measured values is limited by max. simulation capabilities of corresponding current source. Measurement of parameters with set error is enabled at measurement time over 320 ms. Note – The following notation is accepted in absolute error formulae: Xe – end value of measurement range (limit) of corresponding parameter; x – measured value of corresponding parameter. 
Parameter 
Value 

Time interval measurement ranges 
0.0 – 999.9 ms 
1.000 – 9.999 s 
10.00 – 99.99 s 
100.0 – 999.9 s11) 
1000 – 9999 s11) 
Resolution 
0.1 ms 
0.001 s 
0.01 s 
0.1 s 
1 s 
Permissible absolute time interval measurement error limits 
±0.5 ms 
±0.01 s 
±0.1 s 
±1 s 

Time parameter measurement capability: 

 operate time 
+ 

 reset time 
+ 

 closed (open) state duration 
+ 

 contact operate/reset time diversity 
+ 

 contact bounce time 
+ 

Binary inputs: 

 type of binary inputs 
“dry contact”; contact with potential up to + 300 V 

 initial current inrush, mA, min. 
50 

Binary output: 

 type of binary outputs 
contact with load capacity up to ~5 A, 250 V and =5 A, 30 V 

 switching capacity at DC voltage within range 24 … 250 V and active load, W, min. 
30 

11) Metrological performance is not rated over 99.99 s. Typical error is specified. 
Parameter 
Value 
Source 3 operation single pulse mode 

 single pulse output time variation range 
20 – 100 ms with 20 ms step 
100 – 1000? ms with 100 ms step 

1 – 10? s with 1 s step 

 factory setting, ms 
100 
Source 3 operation pulse mode 

 pulse output and pause time variation range 
20 – 100 ms with 20 ms step 
100 – 1000? ms with 100 ms step 

1 – 5? s with 1 s step 

 output time factory setting, ms 
500 
 pause time factory setting, s 
5 
Measurement in pulse modes 

 whole range 20 ms – 10 s 
any manual measurement limit 
 for range 20 – 300 ms 
"6 V" limit of PV1, PV2 inputs; "500 A" limit of I5 output; "10 A" limit of PA input 
 for range 400?ms – 10 s 
all limits of U3U6, I3, I5 outputs; PV1, PV2, PA inputs 
Currentbased recording (from PV1, PV2, PA, I2, I3, I5 measuring units) 

 count stop signal for PV1 and PV2 inputs ("6 V" default limit) 
voltage reduction to 0.1 limit level (0.6 V for "6 V" limit) 
 count stop signal for PA input and I2, I3, I5 outputs 
current reduction to 0.1 limit level (1 A for "10 А" limit) 
 measurement resolution, ms 
2.5 
Second timer input contact vibrations insensitivity filter: 

 time constant variation range, ms 
1 – 40 
 factory setting, ms 
3 
Contact bounce time measurement: 

 contact closing recording delay variation range, ms 
0.1 – 10.0 
 factory delay setting, ms 
1.0 
Note – Pulse mode time interval values are given for mains frequency of 50 Hz. 
Parameter 
Value 
Operating temperature range, °С 
 20 … + 50 
Temperature of normal conditions, °С 
20 ± 5 
Transportation temperature, °С 
 50 … + 70 
Storage temperature, °С 
 50 … + 70 
Relative humidity, %, max. 
95 
Atmospheric pressure, kPa 
73.3 …106.7 
Altitude above sea level, m, max. 
2000 
Operating conditions group as per GOST 17516.190 
М23 
Device power supply: 

 singlephase mains frequency, Hz 
45 – 65 
 mains voltage, V 
187 – 264 
Parameter 
Value 

Protection degree as per GOST 1425496: 

 enclosure 
IP20 

 output terminals 
IP00 

Safety requirements as per GOST 12.2.0912012: 

 insulation 
basic 

 measurement category (overvoltage category) 
CAT II 

 microenvironment contamination degree 
2 

Insulation electrical strength test voltage11), V: 

 mains power supply circuits to enclosure 
1500 

 conductive components of Source 1, Source 2 to mains power supply circuits / enclosure 
1500 

 conductive components of Source 3 to mains power supply circuits / enclosure  PV1, PV2 multimeter inputs to mains power supply circuits / enclosure 
1500 1500 

 “К1”, “К2” second timer inputs to mains power supply circuits / enclosure and to each other 
1500 

between conductive components (to each other) 
1500 

Insulation resistance between enclosure and galvanically isolated conductive components of the device, MOhm, min. 
40 

Electric shock hazard protection 
GOST 12.2.007.075 Class I 

EMC requirements 
GOST R 51317.6.52006 

Rated power consumption, V ×A, max. 
3000 

Current consumption, A, max. 
30 

Weight, kg, max. 
19 

Overall dimensions, mm, max. (hхwхd) 
340 × 430 × 205 

11) AC voltage, frequency of 50 Hz 
Parameter 
Value 

Mean lifetime of devices, years, min. 
30 

Mean time between failures, hours, min. 
25 000 

Mean time to recovery including fault tracing (by a licensed specialist) time, hours, max. 
3 