RETOM71 is designed for test and highaccuracy metrological verification of:
Main advantages:
At customer’s request, the following can be included into the delivery kit (see Figure 4.2):
SPE “Dynamics” guarantees high quality and reliability of RETOM71 within 5 years from the date of delivery.
Parameter 
Value 
Quantity of sources, pcs. 
2 galvanically isolated groups of 3 starconnected sources each 
One source AC current simulation limit (rms value), A 
20 
One source DC current simulation limit, A 
15 
Min. current variation step, mA 
1.0 
Max. output voltage (amplitude value), V, max. 
28 
Max. output power of one source, V·A, max. 
250 
Total max. power of all sources in singlephase mode, V·A, max. 
1000 
Total max. power of all sources in threephase mode, V·A, max. 
1500 
Permissible basic absolute AC current simulation error limits within frequency range 48 … 52 Hz, A 
±(0.0009x + 0.00005Xe) 
Permissible basic absolute DC current simulation error limits, A 
±(0.0009x + 0.00005Xe) 
Max. channel current in different operation modes of sources, A 

in the mode of six sources or two independent threephase systems, or each channel is used independently 
20 
in threephase mode of increased current (three channels of 2 parallelconnected sources each) * 
40 
in singlephase mode (two groups of 3 sources, with three sources of each group connected in parallel) * in singlephase mode (six sources of two groups are connected in parallel) * 
2 х 60 120 
Output circuit protection of each source against: 

 load circuit break 
+ 
 overvoltage and signal waveform distortion 
+ 
 external voltage 
+ 
Overload protection operation level, V (rms value) 
19 
Thermal protection operation time of current sources: 

 at max. source output power under cold state 20 °С, minutes, min. 
1 
 at source output power at 10 % of max. output power 
Continuous 
Limits of permissible complementary AC and DC current simulation error caused by ambient temperature variation do not exceed 0.5 of basic error limit per 10 °С of normal temperature (20 ± 5) °С 

* Error in these conditions is determined as root of sum of error squares for each channel in use. Note – The following notation is used in absolute error formulas: Хe  variation range end value of respective parameter (upper limit); x  measured value of respective parameter. 
Parameter 
Value 
Quantity of sources, pcs. 
6 
One source AC voltage simulation limit (rms value), V 
140 
DC voltage simulation limit (two sources in series), V 
390 
Min. voltage variation step, mV 
1 
Permissible basic absolute AC voltage simulation error limits within frequency range 45 … 65 Hz, V 
±(0.0004x + 0.00005Xe) 
Permissible basic absolute DC voltage simulation error limits, V 
±(0.0004x + 0.00005Xe) 
Max. source output power, V·A, max. 
35 
Max. voltage in different operation modes of sources, V 

 in threephase mode 
140.00 
 in singlephase mode (2 sources connected in series) * 
280.00 
Max. output power in DC mode at 380 V, W, min. 
35 
DC voltage ripple factor, % of output value, min. 
0.1 
Output circuit protection of each source against: 

 shortcircuit fault in the load circuit 
+ 
 overload 
+ 
 external voltage 
+ 
Fault protection operation level, A: 
0.3 (for duration ≥ 4 ms) 
Thermal protection operation time of sources: 

 at max. output power, cold state 20 °С, minutes, min. 
10 
 at source output power of 20 % of max. output power 
Continuous 
Limits of permissible complementary AC and DC current simulation error caused by ambient temperature variation do not exceed 0.5 of basic error limit per 10 °С of normal temperature (20 ± 5) °С 

* Error in these conditions is determined as root of sum of error squares for each channel in use. Note – The following notation is used in absolute error formulas: Хe  variation range end value of respective parameter (upper limit); x  measured value of respective parameter. 
Parameter 
Value 
Frequency range of simulated current signals, Hz 
1 … 1000 
Frequency range of simulated voltage signals, Hz 
1 … 2100 
Min. frequency variation step, Hz 
0.001 
Permissible absolute error of frequency setting, Hz, within frequency range 45 … 65 Hz 
± 0.00001 
Permissible absolute error of frequency setting, Hz, within frequency ranges 1 … 45 Hz and 65 … 2100 Hz ** 
± 0.01 
Sinusoidal signal phase angle setting range, power frequency 50 Hz, degrees 
0 … 360 
Min. phase angle variation step, degrees 
0.001 
Sinusoidal signal waveform nonlinear distortion factor at mains frequency (50 Hz), measurement bandwidth of 10 kHz, % max.  for current  for voltage 
0.1 0.1 
Permissible absolute error limits of sinusoidal signal phase angle setting (within frequency range 45 … 65 Hz, at signal level within range 10 … 100 % of upper variation limit), degrees 
± 0.1 
** At output signal frequency over 250 Hz max. output signal value decreases. 
Parameter 
Value 
DC voltage simulation range, V 
5 … 264 
Max. output current, A, min. 
1.25 
Max. output power, W, min. 
100 
DC voltage ripple factor, at output voltage of 220 V and max. output power, %, max. 
0.5 
Permissible basic absolute DC voltage variation error, V 
±(0.01x + 0.001Xe) 
Source switchon delay, s, max. 
2 
Output circuit protection against: 

 shortcircuit fault 
+ 
 overload 
+ 
 external voltage 
+ 
Limits of permissible complementary DC current simulation error caused by ambient temperature variation do not exceed 0.5 of basic error limit per 10 °С of normal temperature (20 ± 5) °С 
Parameter 
Value 
Time interval measuring range, s 
0.0010 … 99999 
Resolution, ms 
0.1 
Min. time interval measuring value, ms 
1.0 
Permissible absolute time interval simulation and measuring error limits, ms 
± (0.001x+0.3) 
within range 1100 ms with the use of RET64/32 
±1.0 
Time parameter measuring capability: 

 operate time 
+ 
 reset time 
+ 
 closed (open) state duration 
+ 
 contact operate/reset time diversity 
+ 
 contact bounce time 
+ 
Parameter 
Value 
Quantity, pcs. 
2 
Rated signal frequency, Hz 
50 
DC and AC voltage measuring ranges, V 
0.06 – 6; 6 – 600 
Permissible basic absolute DC and AC voltage measuring error limits, V 
±(0.001x + 0.0001Xe) 
Input overload capability, % of upper measuring limit 
130 
Embedded voltmeter input resistance, kOhm, min. 
1000 
Additional capabilities: 

 current measuring, by means of a clampon ammeter 
+ 
 frequency measuring 
+ 
 measuring phase angle between two signals 
+ 
 taking oscillograms 
+ 
 signal content calculation 
+ 
Limits of permissible complementary DC and AC voltage measuring error caused by ambient temperature variation do not exceed 0.5 of basic error limit per 10 °С of normal temperature (20 ± 5) °С Note – The following notation is used in absolute error formulas: Хe  variation range end value of respective parameter (upper limit); x – measured value of respective parameter. 
Parameter 
Value 

Quantity, pcs. 
16 

Type 
“dry contact”, transistor key, TTL 15 V 

Max. input DC voltage, V, max. 
300 

Input state reading uncertainty time, ms 
0.1 

Input changeofstate detection resolution, ms, max. 
0.2 

Debounced input delay control range, ms 
1.0 – 10 

Initial current inrush, mA, min. 
30 
Parameter 
Value 

Quantity, pcs. 
12 
4 
Type 
Transistor 
Relay 
Active load switching capacity: 

 DC current, A 
0.12 
5 
 DC voltage, V 
400 
250 
 AC current, A 
0.085 
16 
 AC voltage, V 
285 
250 
Intrinsic binary output close time, ms, max. 
2 
20 
Intrinsic binary output open time, ms, max. 
2 
20 
Parameter 
Value 

Current and voltage simulation based on recorded oscillograms:  recording format  max. recorded oscillogram duration, s, min.  binary signal simulation accuracy, ms, max.  simulated analog signal sampling frequency 
СОМТRADE 10 1.0 200 points per period (20 ms) 

Connection of synchronized devices:  in one room, with the use of the synchronization cable  in adjacent rooms, with the use of RETGPS module 
up to 9 devices no restrictions 

Two devices timing accuracy, ms, max. 
1.0 

Controlling device (PC) communication port 
Ethernet 

Source control modes 
manual, automatic, programmable 

Power supply circuit insulation to device enclosure test voltage, V (DC) 
1500 

Conductive components insulation (apart from analog inputs) to enclosure/power supply circuits test voltage, V (AC) 
1500 

Galvanically isolated sources to other groups test voltage, V (AC) 
1500 

Galvanically isolated voltage and 1st group current sources insulation to galvanically isolated 2nd group current sources test voltage, V (AC) 
1500 

Analog inputs insulation to enclosure/power supply circuits test voltage, V (AC) 
2000 

Binary inputs insulation (to each other) test voltage, V (AC) 
500 

Weight, kg, max. 
16 

Overall dimensions (without handle) W×H×D, mm, max. 
500 × 180 × 380 

Overall dimensions (with handle) W×H×D, mm, max. 
500 × 150 × 470 
Parameter 
Value 
Operating ambient temperature range, °С 
0 … 50 
Temperature of normal conditions, °С 
20 ± 5 
Ambient temperature range during storage and transportation, ºС 
50 … +70 
Relative humidity, %, max. 
95 
Atmospheric pressure, kPa 
79 … 106.7 
Altitude above sea level, m, max. 
2000 
Operating conditions group as per GOST 17516.190 
М23 
Protection degree as per GOST 1425496 
IP20 
Safety requirements as per GOST R IEC 609502002 
Class I 
Testing device power supply: 

 singlephase mains, V 
220 – 120 (+ 44) 
 mains frequency, Hz 
45 … 65 
 power consumption, V·A, max. 
3600 
Parameter 
Value 
Mean lifetime of devices, years, min. 
30 
Mean time between failures, hours, min. 
25000 
Mean time to recovery including fault tracing time, hours, max. 
3 