ELKO PRI-41 Current Monitoring Relay Instructions

: June 12, 2024
: ELKO

Table of Contents

Characteristics
Symbol
Connection
Description
Technical parameters
Function
Warning
Customer Support
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ELKO PRI-41 Current Monitoring Relay

ELKO PRI-41 Current Monitoring Relay

Characteristics

Used to monitor overload/relief (machines, motors, etc.), check consumption, diagnostic on a remote device (burning, short circuit, increased current draw, etc.)
Relay is used for monitoring AC or DC current in three ranges.
Monitors level of current in two independent levels (Imax, Imin).
setting the monitored upper level (Imax) in % of range.
setting the monitored lower level (Imin):
in % of the set upper limit (PRI-41, function HYSTERESIS)
in % of range (PRI-42, function WINDOW)
Selectable function of output contacts (independently/in parallel).
Independent adjustable time delay of both levels
(eliminating short-term drops and spikes).
Galvanically separated power supply from monitoring inputs.
Output contact for each monitored current level.

Symbol

Connection

Description

Supply voltage terminals (A1-A2)
Supply voltage indication
Level indication Umax
Output indication
Level indication Umin
Current monitoring terminals (C-B1-B2-B3)
Type of monitored current
Memory function
Output function setting
Hysteresis setting
Time delay setting (Umax)
Upper level setting (Umax)
Memory reset
Time delay setting (Umin)
Lower level setting (Umin)
Output contact 2 (28-25-26)
Output contact 1 (16-15-18)

Table

Technical parameters

Supply circuit

Supply terminals:	A1-A2
Supply voltage:	UNI
Consumption (max.):	3 VA/1 W
Supply voltage:	400V
Consumption (max.):	5 VA/2.5 W
Supply voltage tolerance:	–15 %; +10 %

Measuring circuit

Monitored terminals:	C-B1	C-B2	C-B3
Monitored ranges*:	AC/DC 3.2 – 16 A (AC 50-60 Hz)	AC/DC 1 – 5 A (AC 50-60
Hz)	AC/DC 0.32 – 1.6 A (AC 50-60 Hz)
Input resistance:	2.3 mΩ	11 mΩ	23 mΩ
Max. permanent current:	16 A	8 A	3 A
Inrush overload (1 s):	20 A	16 A	6 A
Time delay Imax (t1):	adjustable, 0.1 – 10 s
Time delay Imin (t2):	adjustable, 0.1 – 10 s

Accuracy

Setting accuracy (mech.):	5 %
Repeat accuracy:	< 1 %
Temperature dependence:	< 0.1 %/°C (°F)
Limit values tolerance:	5 %
Hysteresis (fault to OK):	selectable, 5 %/10 % from the upper range value

Output

Contact type:	2× changeover/SPDT (AgNi)
Current rating:	16 A/AC1
Breaking capacity:	4000 VA/AC1, 384 W/DC1
Inrush current:	30 A/< 3 s
Switching voltage:	250 V AC/24 V DC
Power dissipation (max.):	2.4 W
Mechanical life:	10.000.000 ops.
Electrical life (AC1):	100.000 ops.

Other information

Operating temperature:	–20 .. 55 °C (–4 .. 131 °F)
Storage temperature:	–30 .. 70 °C (–22 .. 158 °F)

Dielectric strength:
supply – output
output 1 – output 2| AC 4 kV
AC 4 kV
Operating position:| any
Mounting:| DIN rail EN 60715
Protection degree:| IP40 front panel / IP20 terminals
Overvoltage category:| III.
Pollution degree:| 2
Cross-wire section – solid/ stranded with ferrule (mm2):| max. 1× 2.5, 2× 1.5 / max. 1× 2.5 (AWG 14)
Dimensions:| 90 × 52 × 65 mm (3.5˝ × 2˝ × 2.6˝)
Weight:| UNI – 166 g (5.86 oz), 400V – 248 g (8.7 oz)
Standards:| EN 60255-1, EN 60255-26, EN 60255-27

Only one input can be monitored at a time.

Function

If the value of the monitored current is in the zone between the set upper and lower levels, the OK state occurs, both output contacts are closed and the yellow LED illuminates. If the value of the monitored current is outside the set limits (> Imax or < Imin), a fault state occurs.
When moving to a fault state (I > Imax), time delay t1 is running and red LED >I simultaneously flashes. After the time t1 elapses, the red LED >I illuminates and the relevant output contact opens.
When moving to a fault state (I < Imin), time delay t2 is running and red LED <I simultaneously flashes. After the time t2 elapses, the red LED <I illuminates and the relevant output contact opens.
When moving from a fault state to the OK state, the relevant red LED immediately goes out, and the corresponding output contact closes.

Warning

This device is constructed for connection in 1-phase network AC/DC 24 – 240 V, AC 400 V and must be installed according to norms valid in the state of an application. Installation, connection, setting and servicing must be carried out by qualified electrician staff only, which have perfectly understood the instructions and functions of the device. This device contains protection against overvoltage peaks and disturbing impulses in the power supply network. For the correct function of the protection of this device, there must be suitable protections of higher degrees (A,B,C) installed in front of them and according to the standards, interference of switching devices must be securely eliminated (contactors, motors, inductive loads, etc.). Before installation, make sure that the device is de-energized and the main switch is in the “OFF” position. Don‘t install the device to sources of excessive electromagnetic interference. Ensure correct installation by perfect air circulation so that during continuous operation and a higher ambient temperature, the device does not exceed the maximum allowed operating temperature. For installation and setting use a screwdriver with a width of approx 2 mm. Keep in mind that this is a fully electronic device and approach accordingly with the installation. Non-problematic function of the device is also dependent on the previous method of transportation, storage, and handling. In case of any signs of damage, deformation, malfunction, or missing parts, don‘t install this device and claim it at the dealer. The product must be treated as electronic waste at the end of its life.