Universal terminals OTL

Universal terminal blocks for copper and aluminium

Universal terminals OTL are designed for copper and aluminium conductors. The terminals are suitable for all types of copper or aluminium conductors with cross section up to 240 mm². Multiple copper wires can be placed to the OTL terminal blocks according to the respective terminal type (see Table of universal terminals OTL wiring connectivity below). IP protection class for OTL terminals is IP20.

Certification and product safety

Universal terminals OTL are tested and certified by following standards:
EN 60947-7-1:2009 „Low-voltage switchgear and control gear – Part 7-1: Ancillary equipment – Terminal blocks for copper conductors“
EN 61238-1:2003 „Compression and mechanical connectors for power cables for rated voltages up to 30 kV (Um = 36 kV) – Part 1: Test methods and requirements“
All connectors used inside switchgears or similar appliances must fulfil these requirements.

EN 61238-1:2003 for copper and aluminium cables are divided into two classes.

Class A (heat cycle and short-circuit tested) – These are connectors intended for electricity distribution or industrial networks in which they can be subjected to short-circuits of relatively high intensity and duration. Therefore, Class A connectors are suitable for most applications.

Class B (heat cycle tests only, not short-circuit tested) – These are connectors for networks in which overloads or short-circuits are rapidly cleared by the installed protective devices, e.g. fast-acting fuses.

Universal terminals OTL are tested and certified class A connectors and the housing is made of self-extinguishing UL 94 V-0 class plastic material.

For choosing safe and reliable connector, always make sure that the terminal is equipped with CE and Class A markings with the symbol of certifying institute, for example FI -mark.

Material classification according to UL 94 V-0 standard (vertical burning test)

Criteria Conditions	94 V-0	94 V-1	94 V-2
Total flaming combustion for each specimen	≤ 10 sec	≤ 30 sec	≤ 30 sec
Total flaming combustion for all 5 specimens of any set	≤ 50 sec	≤ 250 sec	≤ 250 sec
Flaming and glowing combustion for each specimen after second burner flame application	≤ 30 sec	≤ 60 sec	≤ 60 sec
Cotton ignited by flaming drips from any specimen	No	No	Yes

Table of universal terminals OTL wiring connectivity

	Conductor cross section mm² / number of wires Al/Cu															Tightening torque	In (A)
Type	1.5	2.5	4	6	10	16	25	35	50	70	95	120	150	185	240	(Nm)	Al/Cu
OTL 16	1/3	1/3	1/2	1/2	1/1	1/1										1,5 Nm (1,5-6 mm²) 7 Nm (10-16 mm²)	75/82
OTL 35 OTL 35-2 OTL 35-3X OTL 35-5X		1/3	1/3	1/3	1/3	1/2	1/1	1/1								3 Nm (2,5-16 mm²) 6 Nm (25-35 mm²)	120/135
OTL 50 OTL 50-2 OTL 50-3	1/3	1/3	1/3	1/3	1/3	1/3	1/2	1/1	1/1							1,5 Nm (1,5 – 2,5 mm²) 5 Nm (4-10 mm²) 10 Nm (16-50 mm²)	145/160
OTL 95 OTL 95-2 OTL 95-3				1/3	1/3	1/3	1/3	1/2	1/1	1/1	1/1					12 Nm (6-25 mm²) 22 Nm (35-95 mm²)	220/245
OTL 150 OTL 150-2 OTL 150-3							1/3	1/3	1/3	1/2	1/1	1/1	1/1			14 Nm (25-50 mm²) 30 Nm ( 70-150 mm²)	290/320
OTL 240 OTL 204-2								1/3	1/3	1/3	1/2	1/2	1/1	1/1	1/1	26 Nm (35-120 mm²) 40 Nm (150-240 mm²)	380/425

Universal distribution blocks for copper and aluminium

Distribution blocks OJL are intended for distributing conductors with larger cross section to several smaller ones. These blocks are provided in 6 standard designs with a nominal connecting cross section of 70 mm² AL/CU (6 outputs for copper cable), 120 mm² AL/CU (11 outputs for copper cable) and 240 mm² AL/CU (7 outputs for copper cable). AF and AFS models are designed for connecting (input) of flexibars 10 x 25 mm or several bars of 1 x 25 mm.

The screws are tightened by a hexagonal key. Blocks can be installed on a standard DIN rail or can be mounted using screws on a flat solid surface. Maximum operating temperature is 80 °C. Cover sealing is possible in models AS and AFS. Housing for all design types has a protection class IP20.

Certification and product safety

Morek distribution blocks OJL are tested and certified by following standards:
EN 60947-7-1:2009 „Low-voltage switchgear and control gear – Part 7-1: Ancillary equipment – Terminal blocks for copper conductors“
EN 61238-1:2003 „Compression and mechanical connectors for power cables for rated voltages up to 30 kV (Um = 36 kV) – Part 1: Test methods and requirements“
All connectors used inside switchgears or similar appliances must fulfil these requirements.

EN 61238-1:2003 for copper and aluminium cables are divided into two classes.

Morek distribution blocks OJL are tested and certified class A connectors.

For choosing safe and reliable connector, always make sure that the terminal is equipped with CE and Class A markings with the symbol of certifying institute, for example FI -mark.

Two- and four-pole distribution blocks

Distribution blocks Moblock are offered in two-pole (up to 35 mm² and 125A) and four-pole (up to 50 mm² and 160A) versions. Terminal blocks are placed on isolated brackets and are covered with easily removable transparent plastic cover. Terminal blocks are covered with a plastic part also from the bottom and between each busbar an insulating barrier is included.

Installation is possible on the DIN rail or panel using screws. Conductive part is made of brass, the connecting parts are made of steel, Zn galvanized.

For convenient and easy connection the 160A type input is separated on the busbar from the outputs. Massive 50 mm² endpoint on the busbar does not limit current capacity of the block and is set into the reinforced plastic housing.

Certification and product safety

Distribution blocks Moblock are tested and certified by following standards:
EN 60947-7-1:2009 „Low-voltage switchgear and control gear – Part 7-1: Ancillary equipment – Terminal blocks for copper conductors“
The products are marked by CE and are in RoHS-compliance.

Distribution blocks Moblock connectors housing is made of self-extinguishing UL 94 V-0 class plastic material.

Material classification according to UL 94 V-0 standard (vertical burning test)

Criteria Conditions	94 V-0	94 V-1	94 V-2
Total flaming combustion for each specimen	≤ 10 sec	≤ 30 sec	≤ 30 sec
Total flaming combustion for all 5 specimens of any set	≤ 50 sec	≤ 250 sec	≤ 250 sec
Flaming and glowing combustion for each specimen after second burner flame application	≤ 30 sec	≤ 60 sec	≤ 60 sec
Cotton ignited by flaming drips from any specimen	No	No	Yes

Bare and tinned insulated copper flexibars

Insulated copper flexibars Moflex are manufactured out of highly flexible copper strips either in bare or tinned version. They are insulated with high quality mechanical, electrical and self-extinguishing PVC.

Comparing with regular copper cable connections with Insulated copper flexibars Moflex – Moflex saves you time and money. Due to skin effect, on average 45% smaller cross section is needed compared to regular copper cable.

Technical details

Electrolytic copper Cu-ETP 99,90%.
Available in plain or tin plated copper.

Insulation

Self-extinguishing UL 94 V-0 black PVC insulation.
Elongation: > 200 %.
Tensile strength: > 15 N/mm².

Electrical characteristics

Nominal voltage 1000 V AC – 1500 V DC.
Dielectric strength of the insulation: > 20 KV/mm.
Operating temperature: -40° C* up to 105° C*.
* not during dynamic pressure

How to choose Insulated copper flexibars Moflex

ΔT = temperature rise of the Moflex conductor (°C)
T1 = internal temperature of the switchboard (°C)
T2 = temperature of the Moflex conductor (°C)

For example, In = 1000A connection

Step 1:
T1 = 35°C and T2 = 85°C
ΔT = T2 – T1
ΔT = 85°C – 35°C
ΔT = 50°C

Step 2:
Please find from the Insulated copper flexibars Moflex technical table
column ΔT = 50 the closest value of the 1000A.
MMC0321001 Moflex 32x1x10, 320 mm², 1049A
MMC0630501 Moflex 63x1x5, 315 mm², 1040A.

Step 3:
Select the Insulated copper flexibars Moflex according to the equipment terminal width.

Plastic or metal reinforced cable gland plates

Multigates are metal or plastic reinforced cable gland plates for leading through low and medium power current cables, but also various types of tubing. The products fit directly to B- or C-standard cut-outs (FL 13 or FL 21). It is not necessary to use any separate glands of seals by using of these multigates. Their use is therefore easy and provides innumerable advantages in a single assembly unit.

Multigates are made of various types of polymers. All of these polymers are RoHS approved (Restriction of hazardous substances in electrical and electronic equipment) and have excellent weather, UV- and ozone resistance. A fundamental chemical resistance is also guaranteed, and partly as protection against splash oil.

EMC-compatible, oil resistant, material in flammability V-0 according to UL 94 and halogen-free models are available.

The temperature range is -40 °C to +100 °C and multigates are designed for indoor and outdoor application.

Material classification according to UL 94 V-0 standard (vertical burning test)

Criteria Conditions	94 V-0	94 V-1	94 V-2
Total flaming combustion for each specimen	≤ 10 sec	≤ 30 sec	≤ 30 sec
Total flaming combustion for all 5 specimens of any set	≤ 50 sec	≤ 250 sec	≤ 250 sec
Flaming and glowing combustion for each specimen after second burner flame application	≤ 30 sec	≤ 60 sec	≤ 60 sec
Cotton ignited by flaming drips from any specimen	No	No	Yes

Gel filled underground connections’ joints

Gel joints Break series is suitable to guarantee insulation of low voltage main and shunted, single-pole and multi-pole connections ranging from 0,6/1 kV.

The list of products is made up of a series for main connections and a series for shunted connections. The first series allows single-pole and multi-pole connections with max. section respectively of 1×185 mm² and 4×25 mm²; the second series allows single-pole and multi-pole shunted connections with max. section respectively of 1×120 mm² e 4×10 mm².

The insulation phase in each joint is made with a separator included in the kit or with the innovative modular insulated terminals, up to five phases with max. section of 35 mm².

Technical specifications

Protection degree IP68
Operating temperature from -20 °C to +90 °C

Regulations compliance

EN 50393 (0.6/1 kV)
EN 60529
RoHS Directive 2011/65/EC
20-37/2-1, 20-37/7
EN 60695-2-11

Components and characteristics

Two polypropylene hinged shells with patented water tight system, made up of a longitudinal ribbing functioning as the gel containing bulkhead. At both ends there are pre-fractured walls that allow gel overflowing, ensuring a good water tightness.
Wire slipping is avoided in longitudinal direction thanks to ribbing at the ends of the shells and in transversal direction thanks to wire fixing with tie-wraps included in the package.
Patented separator made up of two notched plates that allow a reciprocal jointing and two protrusions that block the plates.
There are two holes at the ends of each model to insert and fix tie-wraps. Joint opening can occur only using a tool according to norm CEI 64-8.

Advantages

Re-enterable connection
High mechanical strength with wide range of operating temperature
Fast laying
Cross-linked gel in the two shells (avoiding additional casting)
Versatility of application, even in submerged conditions
High watertight properties
High dielectric strength
Non-sliding wires
High strength against chemical agents or UV rays
No expiration date