the problems

in the case of insufficient insulation the high voltages and rough operating conditions may impair the galvanic isolation. this can result in false signals or even personal injury or damage to the equipment. these risks have to be securely eliminated in the long term through isolation amplifiers that are specially suited for high-voltage applications.

the solution

the varitrans® p 43000 isolation amplifier series has been specially conceived for direct measurement of currents up to 5 a ac/dc. they reliably isolate high potentials at the input circuit.

the isolation unit is designed to permanently withstand potential differences up to 3600 v ac/dc and transient overvoltages up to 20 kv. protection against dangerous currents is achieved through safe isolation to en 61140 from input to output and power supply.

the housing

for the varitrans p 43000 high-voltage isolation amplifiers a new 45 mm wide modular housing is used. it can be fixed on a standard din rail. the front panels of the adjustable models provide a rotary decoding switch for se-lecting the ranges.

the advantages

the varitrans® p 43000 are available for any input currents from ±100 ma to ±5 a. at the output analog unipolar or bipolar (standard) signals are available: ±20 ma, ±10 v, or 4 ... 20 ma. 16 input/output signal combinations can be conveniently se-lected using a rotary coding switch on the device front. tedious adjustments using screwdriver, calibrator, and multimeter are not necessary. drift problems due to instable trimming components (e. g. potentiometers) are avoided. thanks to the easy range se-lection the devices can be flexibly suited to the individual needs of the application. up to 16 customized signal combinations can be implemented in one device.

the integrated 20 to 253 v ac/dc broad-range power supply offers highest flexibility. it ensures problem-free operation with every ac or dc supply voltage utilized world-wide. even instable power supply systems do not cause a problem. installation is safe and easy: erroneous connection of mains supply is practically impossible. expensive standstill times and repair work during the commissioning are prevented.

vacuum encapsulation provides maximum long-term protection against aggressive environmental influences, shock, and vibrations andensures the high disruptive strength required for working voltages up to 3600 v ac/dc. the isolation unit meets the safety requirements of en 61010-1 and en 50124-1 (railway applications: insulation coordination).

the technology

in this product line knick utilizes the new transshield® technology which enables the construction of very compact and low-leakage high-voltage transformers. due to the resulting space savings a just 45 mm modular housing is sufficient for input currents up to 5 a ac/dc. another decisive advantage of this technology: high transient overvoltages (common-mode interferences) are reliably separated and do not cause any notable measurement error at the output.

to guarantee the specified isolation capabilities, the devices are subjected to routine testing with 15 kv ac (fixed-range models) or 10 kv ac (switchable models) on a 100% basis.

circuit design and device construction ensure excellent transmission characteristics, which become manifest in zero stability, linearity, long-term stability, frequency response, and immunity to interference. a cut-off frequency >5 khz and rise time <0.1 ms guarantee distortion-free signal conversion. the output signal follows fast changes in the input signal almost without delay.

specifications
input data
inputs	p 43000 d2	±1 a, ±1.5 a, ±2 a, ±3 a, ±5 a,	calibrated range se-lection, default: ±5a
	p 43000 d2-nnnn	0.1 a ... 5 a, uni/bipolar	1 to 16 ranges to customer requirements,
			calibrated range se-lection
	p 43100 d2-nnnn	0.1 a ... 5 a, uni/bipolar	fixed setting to customer requirements
input resistance	<0.6 ohms
input capacitance	approx. 1 nf
overload	20 % full scale
output data
output	p 43000 d2	20 ma, 10 v uni/bipolar	calibrated range se-lection, default: ±10 v
		and 4 ... 20 ma
	p 43000 d2-nnnn	20 ma, 10 v uni/bipolar	calibrated range se-lection, to customer
		and/or 4 ... 20 ma	requirements
	p 43100 d2-nnnn	20 ma, 10 v uni/bipolar	fixed setting to customer requirements
		or 4 ... 20 ma
offset	factory setting up to ±150 %
load	with output current	≤12 v (600 ohms at 20 ma)
	with output voltage	≤10 ma (1000 ohms at 10 v)
offset error	20 µa or 10 mv
residual ripple	<10 mvrms
transmission behavior
gain error	<0.3 % meas. val.
cut-off frequency	approx. 5 khz; optional factory setting: 10 hz
(–3 db)
common mode	cmrr1)	dc: approx. 160 db
rejection ratio		ac 50 hz:approx. 100 db
temperature	<0,005 %/k meas. val.
influence 2)
power supply
power supply	20 ... 253 v ac/dc	ac 48 ... 62 hz, approx. 2 va; dc approx. 0.9 w
isolation
galvanic isolation	3-port isolation between input, output, and power supply
test voltage	calibrated range	10 kv ac across input and output/power supply
	se-lection
	fixed settings	15 kv ac across input and output/power supply
	(type p43100d2-nnnn)
	all models	4 kv ac output to power supply
working voltage	calibrated range	up to 2200 v ac/dc across input, output, and power supply with overvoltage
(basic insulation)	se-lection	category iii and pollution degree 2 (transient overvoltage: 13.5 kv)
en 61010-1	fixed settings	up to 3600 v ac/dc across input, output, power supply with overvoltage category iii
	(type p43100d2-nnnn)	and pollution degree 2 (transient overvoltage: 20 kv)
rated insulation	calibrated range	up to 2200 v ac/dc across input, output, and power supply with overvoltage
voltage to	se-lection	category iii and pollution degree 2
en 50124-1	fixed settings	up to 3000 v ac/dc across input, output, and power supply with overvoltage
	(type p43100d2-nnnn)	category iii and pollution degree 2
protection against	calibrated range	safe isolation to en 61140 by reinforced insulation according to en 61010-1
electrical shock	se-lection	working voltages with overvoltage category iii and pollution degree 2:
		– up to 1100 v ac/dc across input and output/power supply
		– up to 300 v ac/dc across output and power supply
	fixed settings	safe isolation to en 61140 by reinforced insulation according to en 61010-1
	(type p43100d2-nnnn)	working voltages with overvoltage category iii and pollution degree 2:
		– up to 1100 v ac/dc across input and output/power supply
		– up to 300 v ac/dc across output and power supply
	for applications with high working voltages, you should ensure there is sufficient spacing or isolation from neighboring devices and protection against electrical shocks.
standards and approvals
emc3)	product standard en 61326
	emitted interference:	class b
	immunity to interference:	industry
surge withstand	5 kv, 1.2/50 µs, to iec 255-4 (higher values upon request)
further data
mtbf4)	approx. 96 years
ambient temperature5)	operation:	–10 ... +70 °c
	transport and storage:	–40 ... +85 °c
design	modular housing	45.0 mm
	with screw	see dimension drawing for other measurements
	connectors
protection class	housing ip 40, terminals ip 20
mounting	snap-on mounting on 35 mm top hat rail according to en 60715
weight	approx. 350 g
1) common-mode rejection ratio =
2) reference temperature for tc specifications = 23 °c, the average tc is specified
3) slight deviations are possible while there is interference
4) mean time between failures - mtbf - to en 61709 (sn 29500). conditions: stationary operation in well-tended rooms, average ambient temperature 40 °c, no ventilation, permanent operation
5) extended temperature range –25 ... +85 °c on request