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優(yōu)價(jià)銷售:

TECHNO ELEC    FT50832    繼電器
TECHNO ELEC    FT50832    繼電器
TECHNO ELEC    FT50832    繼電器
TECHNO ELETRIC    VC2FP 3*100A SM s-nr: 12041SM    信號(hào)隔離器
Technobi s.r.l    TF63B/4 CA NM5 A00626962    電機(jī)
TECHNO-ELEC    FT52360    繼電器
TECHNO-ELEC    FT52360    可編程控制器
TECHNO-ELEC    FT52360    可編程控制器
TECHNO-ELEC    FT52360    可編程控制器
TECHNO-ELEC    FT52360    可編程控制器
TECHNO-ELEC    FT52360    可編程控制器
TECHNOELECTRIC    VC4P 3x630A code 14003SM    開(kāi)關(guān)
TECHNOELECTRIC    VC4P 4*630A code 14013SM    開(kāi)關(guān)
TECHNOELECTRIC    VC4P 3x630A code 14003SM    開(kāi)關(guān)
TECHNOELECTRIC    VC4P 4*630A code 14013SM    開(kāi)關(guān)

Differential relays

These relays are used in applications such as DC or AC current differential protection, AC or DC voltage differential protection, etc.…

In this kind of relays, the winding is composed, either of two or several straight bars going inside the magnetic circuit, or of big coiled wire.

Some applications:

• Differential protection relay DC or AC
• Current differential relay motor
• Differential protection relay
• Etc.…
• 
  

Characteristics and Standards

Characteristics:

Techno-Elec relays meet the following characteristics:

• Low consumption and magnetic remanence
• High sensitivity
• High overloads on measuring circuit
• Operation fields:
  in current: from 1 mA to 15 000 A – in voltage: from 10 mV to 10 000 V
• Dielectric strength: up to 20 000 V 50 Hz
• On request: Fire resistance according to standards NFC 16101-16102
• Complying with CEI 77 standard

Standards:

All our relays meet the Railway standards:

• IEC 60947 Low voltage Switchgear and Controlgear
• IEC 60529 Degree of Protection provided by Enclosures (IP Code)
• IEC 60068-2-11 Environmental Testing, d’environnement : Salt mist, Ka test – 96 h
• IEC 60077 Electric equipment for rolling stock
• IEC 60571 Electronic equipment used on rail vehicles
• IEC 61373 Rolling stock –Shock and vibration tests
• IEC 60255 Electrical relays
• EN 50121 Railway applications – electromagnetic compatibility
• EN 50155 Railway applications – Electronic equipment used on rolling stock
• NF F16-101/102 Railway rolling stock – fire test
• NF F62-002 Railway rolling stock – All-or-Nothing contact relays and its fixed connectors

Current relays

These relays are used in applications such as current detection, threshold control, overload detection, etc. …

In this kind of relays, the winding is composed either of a straight bar going inside the magnetic circuit, or of an Omega-shaped angled bar which goes round the relay core. These relays cover a current range from 15A to 15000A.

The relay operation points can be made adjustable, either by the use of micrometric adjustment contacts, or by adding a second winding additional or subtractive controlled by a rheostat.

In order to cover a current range which varies from the ones corresponding to the big wires and the ones justifying the use of omega bars, windings created from flats were made. These relays cover a current range from 3 to 200A.

Some applications:

• Current detection relay
• Mini and maxi threshold control relay
• Overload detection relay
• Auxiliaries overload detection relay
• Monitoring relay for braking system
• Overload relay excitation motor
• Overload relay train heating
• Main transformer primary overload relay
• Overload relay of traction rectifiers
• Mass relay
• Lighting current relay
• Reverse current relay

Relays presentation

Operation principle

Since 1936, Techno-Elec (Servo-Contact) has been the key partner for electrical traction.
The company has designed and manufactured various voltage and current relays, for on-board or fixed equipment. The relays do not need any auxiliary supply and are usually supplied with one normally-open contact (NO) + one normally-closed contact (NC).

Techno-Elec relays operation is based on the principle of electromechanical magnetic circuit. A flow is created in the magnetic circuit thanks to a current which goes through it, a permanent magnet creates an opposite flow which maintains the contacts in the rest position. As soon as the flow of the magnetic circuit overtakes the one of the permanent magnet, the relay triggers and closes.

The moving armature oscillation on a rectified edge, the armature balancing and the use of a permanent magnet as restoring means, ensure a fast commutation without intermediary position. Our contacts with micrometric settings have pushed back the precision limits.

Basic functions:

• Undervoltage relay
• Overvoltage relay
• Voltage differential relay
• Undercurrent relay
• Overcurrent relay
• Current differential relay

Benefits:

• High galvanic separation
• No auxiliary supply needed
• High reliability, no maintenance needed thanks to the reliable and proven electromagnetic technology
• High ability to resist to high overloads

Examples of applications for on-board equipment:

• Traction control relay, braking
• Traction over-current relay
• Detection relay mini voltage catenary
• Detection relay maxi voltage catenary
• Wheels slip relay
• Insulation break relay
• Battery control relay
• Motor/alternator monitoring relay
• Mass relay

Examples of applications in substation:

• Current detection directional relay (reverse current detection in distribution of electricity)
• Catenary voltage detection relay
• Mass relay for substation
• Current overload relay
•