Detailed information on Italian DOSSENA relays and CONTREL relays:

Leakage protection series
DOSSENA product modelDER3 0D-0E-0I (standard type), DER3 1D-1DL-1I (intermediate type), DER3 2D-2I-2IM (type)
DER3/2.. (type) earth leakage relay has RS485 or RS232 serial output.
Using the DOSSENA next-generation data logger Multilog, this relay can download data and events through an Ethernet port or SD card without the need for additional software.
Complies with the international electrical standard IEC 60947-2:2006 annex M ed.4
All the above models of relays are equipped with logic microprocessors.
Design with dot matrix display.
It can display different colors according to the working status of the device, making it simple, intuitive and easy to use.
There are two specifications to choose from: AC (48-230/400VAC -15% 10%) and DC (24-230VDC, -15% 10%).
There are one to two output contacts NO-C-NC
Even if there is a power outage, the intervention can still be stored.

CONTREL product model：ELRC-ELR-ELR3-ELR7
Not all relays are equipped with logic microprocessors
Cannot download data and events
Does not comply with the international standard IEC 60947-2:2006 annex M. ed.4, and many technical parameters fail to meet the mandatory requirements of this standard.
The size is only 3 rail modules.
No intervention in memory storage function

Circular current transformer
DOSSENA modelD Series
Complies with the international electrical standard IEC 60947-2:2006 annex M ed.4
Continuous short circuit of 100KA-0.5 seconds (mandatory according to standards)
Various specifications of open-loop or closed-loop current transformers
Can increase or double the loop
4 terminal connections: 2 for testing and 2 for normal measurement.
The ferromagnetic core is highly sensitive to current dissipation.
Real testing of current dissipation (injecting real current dissipation into the core of the loop to verify differential protection, while other brands only conduct simulation testing, which is not always reliable.)

D300M (loop multiplier) can reach up to 300A.
Protection level IP30 (terminal IP20)
Open loop: D60A-D110A-D160A-D210A

CONTREL product model：CT-1
Not in compliance with the international electrical standard IEC 60947-2: 2006 annex M ed.4
Only comply with CEI-EN 50081-2 CEI-EN 50082-2, CEI 41.1 CEI-EN 60255, which are outdated standards and cannot meet the mandatory requirements of the new international standards.
CT-M model up to 250A
Protection level: IP20
Continuous short circuit: 40KA-1 seconds. (The new international mandatory standard requires a minimum of 80KA for 0.5 seconds)
There are only two open-loop core models: CT1/160 CT1/210

Multi functional meter and power grid analyzer
DOSSENA model： MIDO 3D, 6D, 96
Capable of RS485/232 serial output
Using the DOSSENA next-generation data logger Multilog, this relay can download data and events through an Ethernet port or SD card without the need for additional software
2 or 4 relay outputs are used for setting alarms.
Two digital outputs (active or reactive power pulses)
It can display different colors according to the working status of the device, such as blue for setting and red for alarm, which is simple, intuitive and easy to use.
The measurement method is TRMS (Effective Value Measurement)
Can be highly compatible with toroidal current transformers
You can enter a password to set protection.

CONTREL product model：EMM, EMM-D, ELM
Old design.
Only red LED display, without dot matrix display.