Surge protection devices

«NTK Priborenergo» LLC is engaged in surge protective devices (SPD) production, intended for communication,
control and measurement systems of the following series:

• SPD CAN; 
• SPD DIO;
• SPD RS485; 
• SPD MBS;
• SPD MSR;
• SPD PWR;
• SPD RS232;
• ETHERNET SPD

DIO Series Surge Protective Devices (SPD)
Multi-stage protection circuits is used to manufacture DIO series surge protective devices (SPD). They are used in order to protect discrete input and output circuits, intended for both control and monitoring. A gas-filled surge arrester is used as a rough protection in the circuits, while a transient voltage suppressor (TVS) (TVS) or varistor, or a combination thereof, is used as the thin protection element. Such a solution allows to achieve a high diverting ability, a sufficiently low threshold for the protection (SPD operating voltage) and a high response speed. The current protection stages together with isolation elements can be placed in a single compact case mounted on a DIN rail, 18 or 36 mm wide, given the relatively low discharge currents values (when compared with power supply circuits). The surge protective devices (SPD) data are connected in a «dry contact» type discrete inputs circuit series, discrete logic voltage signals inputs, discrete inputs of 110…220 V signals, as well as discrete outputs. Besides it’s worth mentioning the protective circuit takes into account both permissible levels of impulse effects on the protected equipment as well as the internal features of the protected circuits of discrete inputs and outputs, including rated current from 0,001 A to 5 A, rated voltage from 6 to 220 V and the digital signals transmission speed data - up to 1 Mbps. The Transient Voltage Suppressor (TVS) diodes provide dissipation up to 1500 W or up to 3000 W of the pulsed power, depending on the components used. The current device is available in versions with the ability to connect from 1 to 3 signal lines and a common wire.

RS485 Series Surge Protection Devices (SPD)
RS485 series surge protection devices (SPDs) are manufactured while using multi-stage protection circuits. They are used to protect communication circuits, working with RS-485 protocol. A gas-filled surge arrester is used as a rough protection in the circuits and as the fine protection element - a transient voltage suppressor (TVS), as well as in some transient blocking unit (TBU) versions from Bourns company. Such a solution contributes to high diverting ability achievement, a sufficiently low threshold for the protection (the operating voltage of the SPD) and a high response speed. SPD data are connected in RS-485 interface circuit. There is a chance to connect both shielded and non-shielded RS485 interface lines.

MBS series surge protective devices (SPD)
Multi-stage protection circuits are used to produce MBS series surge protective devices (SPDs). They are used to protect communication circuits with M-bus interface.  A gas-filled surge arrester is used as a rough protection in the circuits, while a transient voltage suppressor (TVS) or varistor, or a combination thereof, is used as the thin protection element. Such a solution allows to achieve a high diverting ability, a sufficiently low threshold for the protection (SPD operating voltage) and a high response speed. The current protection stages together with isolation elements can be placed in a single compact case mounted on a DIN rail, 18 or 36 mm wide, given the relatively low discharge currents values (when compared with power supply circuits).  SPD data are connected in M-bus series interface circuit. It’s worth mentioning that the protective circuit takes into account both the permissible impulse effects levels on the protected equipment, as well as internal protected circuits features and M-bus interface including rated current up to 1.5 A, rated voltage 48 V and transmission speed up to 1 Mbps transient voltage suppressor diodes provide dissipation up to 1500 W or up to 3000 W of pulsed power, depending on the components used. The device is available in versions with the ability to connect 1 or 2 differential M-bus protocol communication lines.

MSR Series Surge Protective Devices (SPD)
MSR series Surge Protection Devices (SPDs) are manufactured while using multi-stage protection circuits. They are used to protect communication circuits, working with common industrial protocols.  A gas-filled surge arrester is used as a rough protection in the circuits, while a transient voltage suppressor (TVS) or varistor, or a combination thereof, is used as the thin protection element. Such a solution allows to achieve a high diverting ability, a sufficiently low protection threshold (SPD operating voltage) and a high response speed. The current protection stages together with isolation elements can be placed in a single compact case mounted on a DIN rail, 18 or 36 mm wide, given the relatively low discharge currents values (when compared with power supply circuits). The current SPDs are connected in series in the signal circuit and data transmission circuits with various communication interfaces, including RS-485, RS-422, current loop, HART, Profibus, Fieldbus and others. Therefore, the protective circuit must take into account both the permissible impulse effects levels on the protected equipment as well as internal protected circuits and interfaces features, including rated current - from 0.1 A to 0.5 A, rated voltage - 6, 12, 24, 30 B and transmission speed - up to 10 Mbps. TVS diodes provide dissipation up to 1500 W or up to 3000 W of pulsed power, depending on the components being applied. There is a chance to connect both shielded and unshielded two-wire differential communication lines, with one or two signal wires pairs. It is also possible to ground the cable screen through a shunt capacitance.

PWR Series Surge Protection Devices (SPD)
PWR series surge protection devices (SPDs) are manufactured while using multi-stage protection circuits. They are applied to protect secondary power circuits. A gas-filled surge arrester is used as a rough protection in the circuits, while a transient voltage suppressor (TVS) or varistor, or a combination thereof, is used as the thin protection element. Such a solution allows to achieve a high diverting ability, a sufficiently low threshold for the protection (SPD operating voltage) and a high response speed. The current protection stages together with isolation elements can be placed in a single compact case mounted on a DIN rail, 18 or 36 mm wide, given the relatively low discharge currents values (when compared with power supply circuits) . The current SPDs are connected in series to the secondary power circuit. Besides it’s worth mentioning that the protective circuit takes into account both the permissible impulse effects levels on the protected equipment as well as the internal protected circuits and interfaces features, including rated current - 1, 1.5, 3, 5 A, the rated voltage - 6, 12, 24, 30, 48, 60, 80, 110, 170, 220, 350 V. The transient voltage suppressor diodes provide dissipation up to 1500 W or up to 3000 W of pulsed power, depending on the components used. Both one paired power line and two paired power line are available.

RS232 Series surge protection devices (SPD)
RS232 series surge protection devices (SPDs) are manufactured while using multi-stage protection circuits. They are used to protect communication circuits that work with the RS-232 protocol.  A gas-filled surge arrester is used as a rough protection in the circuits, while a transient voltage suppressor (TVS) or varistor, or a combination thereof, is used as the thin protection element. Such a solution allows to achieve a high diverting ability, a sufficiently low threshold for the protection (SPD operating voltage) and a high response speed. The current protection stages together with isolation elements can be placed in a single compact case mounted on a DIN rail, 18 or 36 mm wide, given the relatively low discharge currents values (when compared with power supply circuits). SPD data are connected in series in the RS-232 interface circuit. At the same time, the protective circuit takes into account not only the permissible levels of impulse effects on the protected equipment, but also the internal features of the protected circuits and the RS-232 interface, such as a rated current of 0.5 A, a rated voltage of 24 V and a transmission speed of up to 10 Mbit /from. TVS diodes provide dissipation up to 1500 watts or up to 3000 watts of pulsed power. It is possible to connect both shielded and non-shielded lines of the RS232 interface. The device is available in versions with the ability to connect up to 4 wires of the interface line.

ETHERNET Series surge protective devices (SPD)
Ethernet SPD series surge protection devices are intended to protect equipment while using the Ethernet interface, including PoE, from surge surges (lightning, electrostatic discharges, etc.). The device provides ultra-fast current and voltage protection due to the most advanced element base.
Double protection:
1) High-amplitude smoothing and high-energy interference are provided by high-speed gas dischargers.
2) Transient Voltage Suppressor diodes remove small amplitude interference.